Telegraph key

Details Telegraph key Telegraph key

1978-05-01

1981-12-01

Feldman, Peter

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D1403

Patent

active

D02621126

REFERENCES:
patent: 466492 (1892-01-01), Facer
patent: 776985 (1904-12-01), Barbosa
patent: 1773325 (1930-08-01), Steeneck
patent: 3757045 (1973-09-01), Brown
QST Publication, Nov. 1976, p. 28.

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