Telephonic communications – With check operated control – Fraud or interference prevention
Patent
1987-11-25
1988-08-09
Lev, Robert
Telephonic communications
With check operated control
Fraud or interference prevention
379437, 379155, 379445, H04M 1700
Patent
active
047633522
ABSTRACT:
A lock-down holder for a desk top coin operated telephone includes a base adapted to receive and retain a telephone. The base is adapted to be affixed to a rigid surface and may further include a coin drawer for purposes of increasing the coin storage capacity of a telephone set.
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patent: 3941951 (1976-03-01), Engstrom et al.
patent: 4292477 (1981-09-01), Adams et al.
patent: 4396176 (1983-08-01), Hannula
patent: 4638121 (1987-01-01), Clark, Jr.
patent: 4645876 (1987-02-01), Albertson
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