Recording – communication – or information retrieval equipment – Computer – data processor equipment
Patent
1979-07-13
1981-12-08
O'Keefe, Veronica
Recording, communication, or information retrieval equipment
Computer, data processor equipment
D11157, D11131, 179178, 179179, D14 59, D1403
Patent
active
D02622068
REFERENCES:
patent: D39769 (1909-01-01), Monash
patent: D161838 (1951-02-01), Hoffmann
patent: D255678 (1980-07-01), Thomas
Beecher Keith D.
O'Keefe Veronica
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