Acousticon (div.) ; General Acoustic Co. (previous name) ; Dictograph Security Systems (Florham Park, NJ) Search this
"Symphonic acousticons," hearing aid devices ; "acousticon" perpetual batteries for hearing aids ; "telematic" intracommunication systems ; "dictograph" intercommunicating systems (system of "interior telephones") ; intercom systems ; back of one piece also has advertisement for Dictaphone Sales Corp.
Black and white images
22 pieces; 1 box
Type of material:
New York, New York, United States
Topic (Romaine term):
Medical and surgical instruments and supplies Search this