Extended play cassette

Recording – communication – or information retrieval equipment – Computer – data processor equipment

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D1401

Patent

active

D02708337

REFERENCES:
patent: D203444 (1966-01-01), Fundingsland
patent: D228789 (1973-10-01), Koni
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patent: 3949952 (1976-04-01), Chandler et al.
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patent: 4056834 (1977-11-01), Hiroyasu
patent: 4074876 (1978-02-01), Gourley
patent: 4173319 (1979-11-01), Umeda

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