4. Telephonic communications
  5. With check operated control

QVEX, Inc.

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Coin escrow apparatus for pay telephones

Check-actuated control mechanisms – Including specific check passageway – And movable check diverter
Patent

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Coin escrow apparatus with relay switch contact simulator

Telephonic communications – With check operated control
Patent

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Coin validation apparatus

Check-actuated control mechanisms – Including means to test validity of check – By testing material composition
Reexamination Certificate

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