Stromberg-Carlson was a telecommunications equipment manufacturing company formed as a partnership between Alfred Stromberg and Androv Carlson in 1894, when Alexander Graham Bell's patent for the telephone expired. Stromberg and Carlson were employees of American Bell Telephone Company, and each invested $500 to establish a firm to
manufacture equipment for sale the non-Bell telephone companies.
Stromberg-Carlson was originally located in Chicago, with Carlson managing
manufacture and Stromberg responsible for marketing. In 1904, Stromberg-Carlson
was purchased by Home Telephone Company, a relatively large service provider
which was based in Rochester, New York, and which relocated all of
Stromberg-Carlson to New York.
In 1955, Stromberg-Carlson was purchased
by General Dynamics. In 1982, General Dynamics sold the phone system and
telephone division of Stromberg-Carlson to Comdial Corporation. Comdial went
bust in 2005 and was bought by Vertical Communications, which also bought
phone system maker Vodavi.