ROM cartridge keypad for personal computer

Details ROM cartridge keypad for personal computer ROM cartridge keypad for personal computer

1984-01-05

1986-05-20

Lucas, Susan J.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

Patent

active

D02838958

REFERENCES:
patent: D186316 (1959-10-01), Flanders
patent: 3478857 (1969-11-01), Linker
patent: 4064560 (1977-12-01), Baxter
Datamation, 5-1980, p. 48, Adage GmbH Numeric Entry Keypad.

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