Telephone security device

Details Telephone security device Telephone security device

1976-11-16

1978-07-04

Claffy, Kathleen H.

179 18DA, H04M 166

Patent

active

040990338

ABSTRACT:
A telephone security device for preventing unauthorized use of a telephone subscriber's set comprises an inhibit device for rendering at least partly inoperative the called number selecting means of the set, and a code responsive control means for controlling the inhibit device in dependence upon predetermined code signals applied thereto by the authorized user(s) via the called number selecting means or via a separate keyboard. An emergency service number is obtainable at any time even when other calls are inhibited. Additional predetermined code signals are required to return the inhibit device to an inhibit mode.

REFERENCES:
patent: 3553382 (1971-01-01), Knox et al.
patent: 3692951 (1972-09-01), Hestad et al.
patent: 3872260 (1975-03-01), Oatis
patent: 3873781 (1975-03-01), Nissim
patent: 4045619 (1977-08-01), Harrington

Affiliated with

Also associated with

Rating

Telephone security device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Telephone security device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Telephone security device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-279229