Collection

Inc E T Cunningham

occupation:
Manufacturer
Nationality:
American

Elmer T. Cunningham registers his trademark AudioTron on March 30, 1916 but sells AudioTron tubes since August 1915 with first advertisements in November 1915. On June 15, 1920, Cunningham gets two agreements with the new RCA where he has to drop his production and gets deliveries granted by RCA for his trade name.

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