Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent
1985-04-15
1987-05-05
Lucas, Susan J.
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Telephone equipment
Patent
active
D02896524
REFERENCES:
patent: 4521820 (1985-06-01), Fann
patent: 4549240 (1985-10-01), Hodges
IBM.RTM. Technical Disclosure Bulletin, vol. 26, No. 12, 5-1984, p. 6427, Gilligan, Reusable Write Protect Tab for Floppy Disk.
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