Computer

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment

Patent

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D18 7

Patent

active

D02780607

REFERENCES:
patent: D242251 (1977-02-01), Hazama et al.
patent: D248995 (1978-08-01), Hazama et al.
Computer Design, 10-1980, p. 227, TRS-80 Pocket Computer.
Popular Science, 4-1979, p. 23, Casio ST24 Compact Calculator.

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