Private company

Marconi Wireless Telegraph Company of America

American telegraph company

The Marconi Wireless Telegraph Company of America (commonly called American Marconi) was incorporated in 1899. It was established as a subsidiary of the British Marconi Company and held the U.S. and Cuban rights to Guglielmo Marconi's radio (then called "wireless telegraphy") patents. American Marconi initially primarily operated high-powered land and transatlantic shipboard stations.2 It is part of General Electric.1 It ceased to exist in 1919.1 Wikipedia text CC BY-SA 4.0

Last updated Oct 20, 2026.

Overview

Nov 22, 1899Founded1
  • Industrywireless communication1
  • HeadquartersNew York City1
  • Legal formcorporation1
Marconi Wireless Telegraph 1916
Photo: Unbekannte Autoren und Grafiker; Scan vom EDHAC e.V., Public domain, via Wikimedia Commons4

The Marconi Wireless Telegraph Company of America (commonly called American Marconi) was incorporated in 1899. It was established as a subsidiary of the British Marconi Company and held the U.S. and Cuban rights to Guglielmo Marconi's radio (then called "wireless telegraphy") patents. American Marconi initially primarily operated high-powered land and transatlantic shipboard stations. In 1912, it acquired the extensive assets of the bankrupt United Wireless Telegraph Company, becoming the dominant radio communications provider in the United States.2

Corporate structure

Marconi Wireless Telegraph Company of America is part of a group headed by General Electric. 613 entities, 66 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

  • General Electric
    • Marconi Wireless Telegraph Company of America New York City
    • GE Wind Energy Subsidiary · 100% · Salzbergen, Germany
    • Wabtec Subsidiary · 25% · Wilmington, Delaware, United States
      • FAIVELEY TRANSPORT Gennevilliers, France
        • 1 more
      • ABU GmbH Subsidiary · Germany
      • Annax (Suzhou) Rail Systems Co., Ltd. Subsidiary · China
      • Annax GmbH Subsidiary · Germany
      • Annax Scheiz AG Subsidiary · Switzerland
      • Ateliers Hubert Gerken S.A. Subsidiary · Belgium
      • Austbreck Pty, Ltd. Subsidiary · Australia
      • Bearward Engineering Limited Subsidiary · United Kingdom
      • Becorit GmbH Subsidiary · Germany
      • Bloom China LLC Subsidiary · Delaware, United States
      • Bloom Combustion India Pvt Ltd. Subsidiary · India
      • Bloom Combustions (Shanghai) Co. Ltd Subsidiary · China
      • Bloom Engineering (Europa) GmbH Subsidiary · Germany
      • Bloom Engineering Company, Inc. Subsidiary · Pennsylvania, United States
      • Bloom Engineering Holdings, Inc. Subsidiary · Delaware, United States
      • Brecknell Willis & Co., Ltd. Subsidiary · United Kingdom
      • Cambridge Forming and Cutting Ltd. Subsidiary · Canada
      • Changzhou CRRC Wabtec Diesel Engine Company Limited Subsidiary · China
      • CoFren S.A.S. Subsidiary · France
      • CoFren S.r.l. Subsidiary · Italy
      • Continental Railworks Technology I Inc. Subsidiary · Canada
      • Datong Faiveley Railway Vehicle Equipment Co. Ltd. Subsidiary · China
      • Deptol Limited Subsidiary · Ireland
      • Dotnetix Proprietary Limited Subsidiary · South Africa
      • Durox Company Subsidiary · Ohio, United States
      • and 213 more
    • Baker Hughes Subsidiary · Houston, Texas, United States
      • Baker Hughes (Norway) Subsidiary · Tananger, Norway
      • BJ Services Company Subsidiary · Houston
      • Gaffney, Cline & Associates Subsidiary · Alton
      • Hughes Tool Company Subsidiary · United States
      • Baker Hughes (Canada) Subsidiary · Canada
      • Baker Hughes (United Kingdom) Subsidiary · United Kingdom
      • Baker Hughes Energy Europe B.V. Subsidiary · Netherlands
      • Baker Hughes Energy International B.V. Subsidiary · Netherlands
      • Baker Hughes Energy Manufacturing LLC Subsidiary · Delaware, United States
      • Baker Hughes Energy Services LLC Subsidiary · Houston, Texas, United States
      • Baker Hughes Holdings LLC Subsidiary · Delaware, United States
      • Baker Hughes International Branches LLC Subsidiary · Delaware, United States
      • Baker Hughes International Holdings LLC Subsidiary · Delaware, United States
      • CFC Holdings LLC Subsidiary · Delaware, United States
      • EHHC NewCo LLC Subsidiary · Delaware, United States
      • International Professional Resources USA LLC Subsidiary · Delaware, United States
      • Nuovo Pignone Holding S.p.a. Subsidiary · Italy
      • Nuovo Pignone International S.r.l. Subsidiary · Italy
      • Nuovo Pignone S.r.l. Subsidiary · Italy
      • OIL AND GAS U.S. TREASURY SERVICES LLC Subsidiary · Norwalk, Connecticut, United States
      • PANAMETRICS LLC Subsidiary · Houston, Texas, United States
      • VETCO GRAY INC. Subsidiary · Houston, Texas, United States
      • WAYGATE TECHNOLOGIES USA, LP Subsidiary · Houston, Missouri, United States
    • Compagnia Generale di Elettricità Subsidiary · Milan
    • Dowty Rotol Subsidiary · United Kingdom
    • GE Aerospace Subsidiary · Evendale, Ohio, United States
      • CFM International Subsidiary · Grand Prairie
      • Engine Alliance Subsidiary · East Hartford
      • GE Aviation Systems Subsidiary · Grand Rapids, Michigan, United States
      • GE Honda Aero Engines Subsidiary · Cincinnati
      • Walter Aircraft Engines Subsidiary · Prague
      • "LM WIND POWER BLADES (POLAND)" SPÓŁKA Z OGRANICZONĄ ODPOWIEDZIALNOŚCIĄ Subsidiary · Goleniow, Poland
      • ALSTOM RENEWABLE VIETNAM LIMITED Subsidiary · Ha Noi, Vietnam
      • BHA GROUP INTERNATIONAL PRIVATE LIMITED Subsidiary · Pune, India
      • BIRCHWOOD POWER PARTNERS, L.P. Subsidiary · Stanford, Connecticut, United States
      • COGELEX Subsidiary · Issy-Les-Moulineaux, France
      • Daintree Networks Pty Ltd Subsidiary · Melbourne, Australia
      • GE AVIATION SYSTEMS GROUP LIMITED Subsidiary · Cheltenham, United Kingdom
      • GE AVIATION UK Subsidiary · Cheltenham, United Kingdom
      • GE BRAZIL HOLDING LIMITED Subsidiary · Breda, Netherlands
        • 1 more
      • GE CAPITAL INTERNATIONAL FUNDING COMPANY UNLIMITED COMPANY Subsidiary · Shannon, Ireland
      • GE CAPITAL INTERNATIONAL LIMITED Subsidiary · London, United Kingdom
      • GE ENERGY (USA), LLC Subsidiary · Wilmington, Delaware, United States
      • GE ENERGY INTERNATIONAL COÖPERATIEF U.A. Subsidiary · Breda, Netherlands
        • 1 more
      • GE ENERGY MANUFACTURING TECHNOLOGY CENTER FACTORY (مصنع مركز جنرال الكتريك لتكنولوجيا صناعة الطاقة) Subsidiary · Dammam, Saudi Arabia
      • GE ENERGY POWER CONVERSION GROUP Subsidiary · Issy-Les-Moulineaux, France
        • 1 more
      • GE ENERGY POWER CONVERSION UK LIMITED Subsidiary · Rugby, United Kingdom
      • GE ENERGY POWER CONVERSION USA INC. Subsidiary · Wilmington, Delaware, United States
      • GE ENERGY SWITZERLAND GMBH Subsidiary · Baden, Switzerland
      • GE GAS TURBINES (GREENVILLE) L.L.C. Subsidiary · Greenville, South Carolina, United States
      • GE GLOBAL PARTS & PRODUCTS GMBH Subsidiary · Baden, Switzerland
      • and 61 more
    • GE Capital Subsidiary · Norwalk
      • GE Money Czech Holding Company Subsidiary · United States
    • GE Capital Aviation Services Subsidiary · Stamford
    • GE Consumer & Industrial Subsidiary · Louisville
    • GE Energy Subsidiary · Atlanta
    • GE Global Research (Germany) Subsidiary · Munich, Germany
    • GE HealthCare Subsidiary · Nightingales Lane, United Kingdom
      • Amersham plc Subsidiary · Chinnor, United Kingdom
        • 2 more
      • GE Healthcare (India) Subsidiary
      • "GE HEALTHCARE TKT" LLC Subsidiary · Uzbekistan
      • 3238273 Nova Scotia Company Subsidiary · Canada
      • Beijing GE Hualun Medical Equipment Company Limited Subsidiary · China
      • BK Medical ApS Subsidiary · Denmark
      • BK Medical Australia Pty Ltd. Subsidiary · Australia
      • BK Medical Holding Company, Inc. Subsidiary · Delaware, United States
      • BK Medical Technology Shanghai Co., Ltd. Subsidiary · China
      • BKM Holding Company, Inc. Subsidiary · Delaware, United States
      • Caption Care PC, NJ Subsidiary · New Jersey, United States
      • Caption Health, Inc. Subsidiary · Delaware, United States
      • Critikon de Mexico, S. de R.L. de C.V. Subsidiary · Mexico
      • Datex-Ohmeda, Inc. Subsidiary · Delaware, United States
      • GE BE Private Ltd Subsidiary · India
      • GE Financial Markets Funding I Subsidiary · United Kingdom
      • GE Financial Markets Unlimited Company Subsidiary · Ireland
      • GE Hangwei Medical Systems Co., Ltd. Subsidiary · China
      • GE Healthcare (Austria) Subsidiary · Austria
      • GE HealthCare (Barbados) SRL Subsidiary · Barbados
      • GE Healthcare (Chengdu) Company Limited Subsidiary · China
      • GE Healthcare (China) Co., Ltd. Subsidiary · China
      • GE Healthcare (Netherlands) Subsidiary
      • GE Healthcare (Shanghai) Co Ltd Subsidiary · China
      • GE Healthcare (Tianjin) Co., Ltd. Subsidiary · China
      • and 172 more
    • GE Industrial Subsidiary
    • GE Jenbacher Subsidiary · Jenbach
      • Integral Verkehrstechnik AG Jenbach Subsidiary · Austria
    • GE Lighting Subsidiary · East Cleveland
    • GE Money Bank Subsidiary · Watford
    • GE Oil and Gas Subsidiary · London
    • GE Power Subsidiary · Schenectady
    • GE Security Subsidiary
    • GE Transportation Subsidiary · Chicago
    • GE Vernova (Switzerland) Subsidiary · Baden, Switzerland
    • GE Water Subsidiary · Trevose, United States
    • General Electric (Argentina) Subsidiary · Buenos Aires, Argentina
    • General Electric (Austria) Subsidiary · Vienna, Austria
    • and 20 more

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries listed in Exhibit 21 of annual reports filed with the SEC; subsidiaries, stakes and holdings from Wikidata (CC0); major holders from Schedules 13D and 13G. Each entity in the chart links to its source.

The story

Formation and corporate activities

On July 20, 1897, the Wireless Telegraph and Signal Company, Limited, was founded in London to promote the radio inventions of Guglielmo Marconi. (The company's name was changed to Marconi's Wireless Telegraph Company, Limited in March 1900, and was commonly referred to as "British Marconi".) Looking to expand their efforts worldwide, a roster of subsidiary companies was established, holding regional rights to the Marconi patents. The Marconi Wireless Telegraph Company of America was incorporated in New Jersey on November 8, 1899 as the first subsidiary company. It was granted the "sole right to use and exploit the Marconi patents in the United States of America, the Hawaiian Islands, Philippine Islands, Cuba, Porto Rico, Alaska and the Aleutian Islands".

In the opinion of the Marconi companies, they were the only legitimate radio communication providers, as they asserted that all their competitors provided inferior offerings that infringed on the Marconi patents. Following standard Marconi policy, prior to 1912 American Marconi would not sell equipment, instead leasing it, while supplying operators who were loyal company employees. The most controversial early company policy was the standing order that, except in the case of emergencies, Marconi shore and ship stations would refuse to communicate with vessels employing radio equipment manufactured by other companies. This unwillingness to communicate with other systems would eventually be prohibited by international treaties, beginning with the Preliminary Conference on Wireless Telegraphy held in Berlin in 1903. In the United States, the Wireless Ship Act of 1910, which required that most passenger vessels plying U.S. ports carry radio equipment, also specified that they had to be willing to communicate "with shore or ship stations using other systems of radio-communication". The Radio Act of 1912 instituted radio station licensing, and further required that shore stations open to general public service "shall be bound to exchange radiograms with any similar shore station and with any ship station without distinction of the radio system adopted by such stations".

American Marconi's growth in the United States was initially limited due to some unusual factors. Its largest potential customer was the U.S. government, and in particular the U.S. Navy, which rapidly developed plans to equip its vessels with radio transmitters. However, the Navy would have a contentious relationship with the company during most of its existence. An early source of friction was a Marconi station installed on the Nantucket Shoals light-ship by the New York Herald in the summer of 1901. American Marconi's refusal to communicate with non-Marconi stations soon led to an international incident when, in early 1902, the Nantucket operators were unwilling to acknowledge a transmission from the German vessel Deutschland. The German government made a formal protest, and Navy attempted to get American Marconi to eliminate the restrictive policy, but company officials refused, so the Lighthouse Board ordered the Marconi equipment removed, and it was replaced by a station designed by the Navy.

Naval officials also wanted to purchase radio equipment outright, instead of leasing it, something American Marconi would not agree to prior to the 1912 policy change. They additionally felt the prices American Marconi wanted to charge were exorbitant. Thus, the Navy instead turned to other manufacturers, in particular, the German firm Telefunken. The Navy also contracted with domestic firms to produce equipment according to designs specified by the Navy, and produced additional equipment in its own shops.

On the commercial side, American Marconi's primary early competitor was the American DeForest Wireless Telegraph Company, which in late 1906 reorganized as the United Wireless Telegraph Company. United concentrated on the domestic market, and built far more land stations and had many more shipboard installations than American Marconi. United's competitive advantage was due to the fact that it provided shipboard equipment and operators at little or no cost. It was able to do this because, instead of trying to make a profit on legitimate operations, both American De Forest and United were organized as stock promotion schemes, designed by management to loot the funds of unwary investors purchasing heavily promoted and vastly overpriced stock.

Faced with these barriers, American Marconi initially concentrated on establishing a small number of high-powered land stations, which provided transatlantic communication in competition with the existing undersea telegraph cables, in addition to serving passenger vessels making the Atlantic crossing. As late as early 1912, the company had only five land stations and forty marine installations.

John Bottomley, a New York attorney, had primary responsibility for setting up American Marconi, and after a 1902 reorganization served as the new company's general manager, secretary and treasurer. In 1913 Edward J. Nally took over the general manager's post. In 1905, the position of company president was established, which was held by former New Jersey governor John W. Griggs from the office's establishment until the company's dissolution. Frederick Stammis became the company's chief engineer in 1908, and was replaced by Roy Weagant in 1915. Perhaps the most famous American Marconi employee was David Sarnoff, who was hired as an office boy in September 1906, and by 1917 had become the company's commercial manager. Sarnoff later became the third president of the Radio Corporation of America (RCA).

American Marconi also branched out into some ancillary activities. In 1911, the Wanamaker department stores contracted to have radiotelegraph stations, providing two-way communication, installed atop their Philadelphia and New York City stores. The next year a manufacturing plant was established in Aldene, New Jersey; previously equipment had been imported from Great Britain. Beginning in 1912 the company published a monthly magazine named The Marconigraph, which a year later was expanded and renamed The Wireless Age, and in 1912 it also took over United Wireless' The Aerogram magazine, relaunching it as Ocean Wireless News. One of the more ambitious projects involved tests installing radio communication equipment aboard Delaware, Lackawanna and Western Railroad trains, conducted in 1913. In late 1915 the company announced the formation of the National Amateur Wireless Association (NAWA), an organization oriented towards amateur radio enthusiasts. NAWA's primary objective at its founding was promoting military preparedness. American Marconi also established a publishing house, Wireless Press, Inc. in 1916, and created the Marconi Institute to provide training for commercial operators.

Read the full text

Sale to General Electric and formation of the Radio Corporation of America

At the American Marconi site in New Brunswick, New Jersey, the Navy had installed a high-powered Alexanderson alternator transmitter built by General Electric (GE). It proved to be superior for transatlantic transmissions to the spark transmitters that had been traditionally used by the Marconi companies. Marconi officials were so impressed by the capabilities of the Alexanderson alternators that they began making preparations to adopt them as their standard transmitters for international communication. A tentative plan made with General Electric proposed that over a two-year period the Marconi companies would purchase most of GE's alternator production. However, this proposal was met with dismay on national security grounds by the U.S. Navy, which was concerned that this would guarantee British domination of international radio communication.

The Navy, claiming the support of President Wilson, began to develop an alternative that would result in an "all-American" company taking over the American Marconi assets. In April 1919 two naval officers, Admiral H. G. Bullard and Commander S. C. Hooper, met with GE's president, Owen D. Young, asking that he suspend the pending alternator sales to the Marconi companies. This would leave General Electric without a buyer for its alternators, so the officers proposed that GE purchase American Marconi, and use the assets to form its own radio communications subsidiary. Young consented to this proposal, which, effective November 20, 1919, transformed American Marconi into the Radio Corporation of America. RCA retained most of the American Marconi staff, with former vice president and general manager E. J. Nally becoming RCA's first president. The new company also inherited American Marconi's status as the dominant radio communications firm in the United States.

From Wikipedia’s article on Marconi Wireless Telegraph Company of America, shared under CC BY-SA 4.0.3

Subsidiaries and ownership

Parent company

Former owners and parents

From Wikidata.1

Acquisitions

  1. Succeeded United Wireless Telegraph Company1
  2. Succeeded by Radio Corporation of America1

At the time of the formation of the United Wireless Telegraph Company in late 1906, American DeForest president Abraham White claimed that the new company would be a grand merger between his company and British Marconi plus the Marconi subsidiaries. American Marconi president Griggs quickly and "absolutely and unequivocally" denied White's claim, and further declared that "the scheme of merger announced by Mr. White is antagonistic and repugnant to the interests of both of the Marconi companies". However, United Wireless would continue to be the primary radio communications firm in the United States until its eventual collapse.

United's longstanding stock fraud activities began to unravel in the summer of 1910, when the company's principal officers were arrested by Post Office inspectors and charged with mail fraud. The crippled firm attempted to reorganize, but the Marconi interests saw this as an opportunity to attack the weakened company by launching a patent infringement suit. United's receivers found that their position was hopeless, and in early 1912 entered into negotiations to have their company, which operated 500 ship and 70 land stations, taken over by American Marconi. The resulting transaction consisted of two parts: British Marconi first purchased all of United Wireless' tangible assets, which in turn on March 29, 1912 were sold by the parent company to American Marconi. It would later be alleged that this had unfairly benefited some British investors, in what came to be known as the Marconi scandal.

The acquisition would prove to be a tremendous boost to American Marconi's fortunes, and the company boasted that "There is now nothing in the way of Marconi becoming the only system of commercial importance in the world." Recently passed laws required U.S. passenger ships to carry radio equipment, and American Marconi's near monopoly allowed it to set its own prices for the service. Previously the company had struggled financially, losing money in each of its first eleven years, and had not paid a stock dividend prior to a 2% payout in 1912. However, in his 1912 annual report treasurer John Bottomley exuberantly reported that "The condition of the treasury is satisfactory, if not plethoric. We have, together with cash on hand and investments running 4-12 months, the sum of over five million dollars, all of which is available at any time." In 1915 the company further stated that "The number of ship and shore equipments now operated by your company is approximately twenty times that of three years ago."

From Wikipedia’s article on Marconi Wireless Telegraph Company of America, shared under CC BY-SA 4.0.3

Timeline

  1. Nov 20, 1919Dissolved Dissolved1
  2. Nov 1919Acquired Acquired by General Electric1
  3. Nov 22, 1899Acquired Acquired by The Marconi Wireless Telegraph & Signal Company1
  4. Nov 22, 1899Founded Founded1