Information display system

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment

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D1402

Patent

active

D02645890

REFERENCES:
patent: D236986 (1975-09-01), Schierholz
patent: 3879722 (1975-04-01), Knowlton
patent: 4027958 (1977-06-01), Shigeta et al.
patent: 4038533 (1977-07-01), Dummermuth et al.

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