The story
The company was founded in 1930 by Sir Henry Kelliher with the purchase of Levers and Co. and the Waitemata Brewery Co. in Ōtāhuhu, owned by W.J. Coutts, who became a director.
Coutts' son, Morton Coutts, took over as director in 1946, and later developed a new production process called "continuous fermentation", which enabled beer to be made continuously, without the need to stop and clean between batches. The system proved popular enough to be sold to other brewing companies.
From Wikipedia’s article on DB Breweries, shared under CC BY-SA 4.0.4