Digital communication switching exchange

Details Digital communication switching exchange Digital communication switching exchange

1985-02-13

1988-01-19

Lucas, Susan J.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

D14 52

Patent

active

D02937913

REFERENCES:
patent: D208633 (1967-09-01), Pascale et al.
patent: D283023 (1986-03-01), Gibson
patent: D284187 (1986-06-01), Brown et al.

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