Call cost monitor

Details Call cost monitor Call cost monitor

1979-11-28

1981-04-28

Malzahn, David H.

Boots, shoes, and leggings

179 71R, 364705, G06F 1521

Patent

active

042649560

ABSTRACT:
A telephone call cost monitor to enable the user of a telephone to monitor accurately the cost of his outgoing phone calls while those calls are in progress. The device includes a programmable memory, a micro-computer, a keyboard for data entry, a pickup coil to sense signals on the telephone line, an internal timer, a digital clock display, and start and stop keys. The device enables a user to preprogram at his convenience the telephone numbers he calls and the various tariffs for these calls. Thus, when the user wishes to monitor the cost of a call, he only needs to push the start key when actual connection is made with the called telephone. The cost of the call is continuously displayed and at the completion of the call the user only has to push a reset button to prepare the device for the next call.

REFERENCES:
patent: 3164677 (1965-01-01), Morris et al.
patent: 4013839 (1977-03-01), Bell
patent: 4041291 (1977-08-01), Pavda
patent: 4065640 (1977-12-01), Roviller
patent: 4122308 (1978-10-01), Weinberger et al.

Affiliated with

Also associated with

Rating

Call cost monitor does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-867135