Clip-on electric lock and switching device for telephone

Details Clip-on electric lock and switching device for telephone Clip-on electric lock and switching device for telephone

1980-03-11

1982-06-29

Brown, Thomas W.

179 81C, 179 99H, H04M 121

Patent

active

043373810

ABSTRACT:
A housing for containing accessory controls for an associated telephone mountable within the cradle of the telephone which conforms with the contour of the telephone and has positioned within the housing a card for selectively controlling the circuitry of the telephone.

REFERENCES:
patent: 2558661 (1951-06-01), Murray
patent: 2624965 (1953-01-01), Griswold
patent: 3170359 (1965-02-01), Mourra
patent: 3472966 (1969-10-01), Simmons
patent: 4011413 (1977-03-01), Phillips
patent: 4045619 (1977-08-01), Harrington
patent: 4061888 (1977-12-01), Rasmussen
patent: 4258232 (1981-03-01), Smith et al.

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