Intercommunication unit

Details Intercommunication unit Intercommunication unit

1983-05-25

1986-01-28

Burke, Wallace R.

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D14 92, D14 62, D14 60, D14 52

Patent

active

D02823608

REFERENCES:
patent: D232226 (1974-07-01), Bee et al.
patent: D238186 (1975-12-01), Kramer et al.
patent: D247174 (1978-02-01), Janda
patent: D269432 (1983-06-01), Kowalik et al.
patent: D274518 (1984-07-01), Doodson
patent: D275753 (1984-10-01), Mahan
patent: D277098 (1985-01-01), Mark
patent: D277282 (1985-01-01), Barton et al.
patent: 3916103 (1975-10-01), Morrell et al.
Telesis, vol. 3, No. 3, Fall 1973-article showing on p. 83 the new "Companion" hands-free phone set.
Article re GTE Type 883A Residential "Speakerphone", Mar. 1977, pp. 275-279; view on p. 276.
RadioShack 1981 Cat. No. 328 .COPYRGT.1980; "Duofone"TAD-15 on p. 94.

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