Pager system with use monitoring

Details Pager system with use monitoring Pager system with use monitoring

1992-06-05

1994-10-18

Horabik, Michael

Communications: electrical

Continuously variable indicating

With meter reading

34082544, 34082536, 340636, 455343, G08B 522

Patent

active

053572440

ABSTRACT:
A pager system includes a transmitter with a control unit for selectively transmitting radio signals having specific pager codes, and a plurality of portable pager receivers each having its own electrical energy source and adapted to respond to a specific pager code. The pager system further includes a central unit coupled to the control unit. The central unit includes a comparing unit and is coupled to a first memory for storing information relating to the individual pager receivers, a second memory for storing reference data, a clock, and a presentation unit. The comparing unit compares the contents of the first and second memories for a specific receiver and clock data, and signals the transmitter when a code signal is needed. The presentation unit generates a warning signal in response to a code signal received from the transmitter.

REFERENCES:
patent: 3808538 (1974-04-01), Goransson et al.
patent: 4823280 (1989-04-01), Mailandt et al.
patent: 5032825 (1991-07-01), Kuznicki
patent: 5065084 (1991-11-01), Oogita

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