Channel expander

Details Channel expander Channel expander

1979-07-18

1981-12-15

O'Keefe, Veronica

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D14 52, D14 53, D14 92, 455132, D1402

Patent

active

D02622882

REFERENCES:
patent: D95426 (1935-04-01), Herrick
patent: D105513 (1937-08-01), Cardoza
patent: D237281 (1975-10-01), Spranger et al.
Control Corp., Communications and Control Brochure, 500 Pa. Ave., Irwin, Pa. 15642, Channel Expanders, Eight Line Cu1518, Twelve Line Cu1529, Loud Mouth.

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