Telephone amplifier

Details Telephone amplifier Telephone amplifier

1982-09-14

1983-06-07

Ansher, Bernard

Recording, communication, or information retrieval equipment

Computer, data processor equipment

10403

Patent

active

D02692678

REFERENCES:
patent: D201021 (1965-05-01), Prager
patent: D230487 (1974-02-01), Dawson et al.
patent: 3301955 (1967-01-01), Clements, Jr.
patent: 3619507 (1971-11-01), Metz
patent: 4151376 (1979-04-01), Walker, Jr.
Lafayette Cat. 750, 1975, p. 122, Item No. 7, Snap-On Telephone Amp & Hearing Aid.

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