Prestone phone lock

Details Prestone phone lock Prestone phone lock

1986-09-08

1988-06-07

Ng, Jin F.

Telephonic communications

Terminal accessory or auxiliary equipment

Locking device

70DIG72, H04M 166

Patent

active

047502045

ABSTRACT:
A telephone dial shielding device is provided to cover the dialing area on a telephone base to prevent an unauthorized person from making calls therefrom. A modification includes a door which when unlocked will uncover the dialing area so that a person can make calls without removing the device completely from the telephone base.

REFERENCES:
patent: 1090053 (1914-03-01), Harvey
patent: 2588176 (1952-03-01), Strauch
patent: 3495050 (1970-02-01), Bart
patent: 3624317 (1971-11-01), Buckingham et al.
patent: 3899647 (1975-08-01), Nachsi et al.
patent: 3965310 (1976-06-01), Willy
patent: 4005279 (1977-01-01), Richter
patent: 4081630 (1978-03-01), Washburn et al.
patent: 4297539 (1981-10-01), Fairbanks
patent: 4323739 (1982-04-01), Flax et al.
patent: 4396810 (1983-08-01), Cover

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