Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent
1979-10-11
1982-04-13
Lucas, Susan J.
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Telephone equipment
D18 7, D1402, D1801
Patent
active
D02638274
REFERENCES:
patent: D206068 (1966-10-01), Grossman
patent: D235349 (1975-06-01), Kurozumi
patent: D250022 (1978-10-01), Pycha
Casio AS-L Folder, 10/71, Electronic Calculator.
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