Clip on device for locking touch tone telephones

Details Clip on device for locking touch tone telephones Clip on device for locking touch tone telephones

1981-06-11

1984-01-31

Ansher, Bernard

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D 8331, D1403

Patent

active

D02724405

REFERENCES:
patent: D208576 (1967-09-01), Reisner
patent: D230737 (1974-03-01), Roof
patent: D239179 (1976-03-01), Haber
patent: D245520 (1977-08-01), Smith et al.
patent: 3780234 (1973-12-01), Roof
patent: 4081630 (1978-03-01), Washburn et al.
patent: 4303809 (1981-12-01), Rubinstein et al.
patent: 4304971 (1981-12-01), Flax

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