Combined intercom and telephone key base

Details Combined intercom and telephone key base Combined intercom and telephone key base

1982-03-26

1985-03-19

Word, A. Hugo

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D14 52, D14 92

Patent

active

D02780550

REFERENCES:
patent: D185798 (1959-08-01), Loge
patent: D224409 (1972-07-01), Janda
patent: D243536 (1977-03-01), van de Poel
patent: D247851 (1978-05-01), Muller
patent: D248300 (1978-06-01), Hirasawa et al.
patent: D251296 (1979-03-01), Haas
patent: D255032 (1980-05-01), Maddock
patent: D269780 (1983-07-01), Doodson
patent: D274060 (1984-05-01), Bennet
patent: D274518 (1984-07-01), Doodson

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