Electronic sensor pen

Details Electronic sensor pen Electronic sensor pen

1988-06-22

1991-04-16

Burke, Wallace R.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

Patent

active

D03162532

REFERENCES:
patent: D143052 (1945-11-01), Waldinger
patent: D236271 (1975-08-01), Herczog
patent: D269445 (1983-06-01), Kruckel et al.
patent: D275956 (1984-10-01), Culp
patent: 3937558 (1976-02-01), Mukai et al.
patent: 4034155 (1977-07-01), Muller et al.

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