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Assorted product brochures for Cunningham radio tubes. Also includes news clipping about the lawsuit between Cunningham and his silent partner Harry Smissaert. (Filed under "Cunningham") ON EXHIBIT (Perham, 2015-16) : Cunningham Radio Tube Data Book, 1923, and Cunningham Radio Tubes branded brochure, presenting Broadcasting Stations by Call Letters,...c.1923.
Electronics (LCSH) Vacuum-tubes--Catalogs (LCSH) Radio--Equipment and supplies--Catalogs (LCSH) Electronic industry--California--San Francisco Bay Area E. T. Cunningham, Inc. (San Francisco, Calif.) Actions & defenses Cunningham, Elmer T