Modular loudspeaking telephone unit

Details Modular loudspeaking telephone unit Modular loudspeaking telephone unit

1983-05-02

1985-09-03

Burke, Wallace R.

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D14 62, D14 58

Patent

active

D02804034

REFERENCES:
patent: D190234 (1961-05-01), Mono
patent: D196434 (1963-10-01), Kobler et al.
patent: D203596 (1966-01-01), Kamp
patent: D232226 (1974-07-01), Bee et al.
patent: D238186 (1975-12-01), Kramer et al.
patent: D245871 (1977-09-01), Smith
patent: D258283 (1981-02-01), Stoddard
patent: D269432 (1983-06-01), Kowalik, Jr. et al.
patent: D272906 (1984-03-01), Heinzehman et al.
patent: D273490 (1984-04-01), Chen
patent: D275753 (1984-10-01), Mahan

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