Ringer system for a telephone

Details Ringer system for a telephone Ringer system for a telephone

1980-08-29

1983-02-15

Popek, Joseph A.

H04M 100

Patent

active

043743072

ABSTRACT:
A telephone ringer system is disclosed which uses an oscillator circuit to drive a piezoelectric transducer to produce the ring signal.

REFERENCES:
patent: 3387097 (1968-06-01), Beadle et al.
patent: 3466403 (1969-09-01), Combridge et al.

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