Encyclopedia Dubuque
"Encyclopedia Dubuque is the online authority for all things Dubuque, written by the people who know the city best.”
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Affiliated with the Local History Network of the State Historical Society of Iowa, and the Iowa Museum Association.
SONOTONE OF DUBUQUE
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SONOTONE OF DUBUQUE. Sonotone, a leader in technology to help the deaf, was established and incorporated in 1929.
The 1948 Dubuque Classified Business Directory listed 506 BANK AND INSURANCE BUILDING.
The 1957 through 1989 Dubuque City Directory listed 245 W. 10th.
See: Sonotone Corporation History. Online: http://www.roger-russell.com/sonopg/sonopg.htm