Digitally activated coin control circuit

Details Digitally activated coin control circuit Digitally activated coin control circuit

1979-09-24

1981-01-06

Brigance, Gerald L.

H04M 1700

Patent

active

042438411

ABSTRACT:
A digitally activated coin control circuit for use in combination with a digitally activated ringing circuit for common manipulation of a prepaid coin station by a central processing unit of a telephone switching center to collect and alternatively to refund deposited coins.

REFERENCES:
patent: 3278693 (1966-10-01), Sherstiuk
patent: 3456081 (1969-07-01), Pharis et al.
patent: 3760112 (1973-09-01), Busch
patent: 4174468 (1979-11-01), Stelte

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