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US 5,231,658 AGranted
Telephone privacy device
OwnerVakis Eftechiouinventor
Life of this patent
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OwnerVakis Eftechiouinventor
Estimating the term…
A telephone privacy protector for connection to a common exchange line and each one of at least two telephone operated devices sharing a line includes a voice connecting circuit for connection between a respective telephone line operated device and the line. There is a control deice connected to the circuit having an on and off state wherein the control device in the on state permits the voice connecting circuit to operate. There are means for turing the control device on when the respective telephone line operated device goes off hook provided that no other telephone line operated device sharing the line is off hook. There are means for providing a residual charge to the control device in order to reactivate same after the respective telephone line operated device is placed momentarily on hook and then returned to an off hook state while any other telephone line operated device connected to the line is off hook.
A telephone privacy protector for connection to common exchange line and one of at least two telephone line operated devices sharing said line, the privacy protector comprising:
A telephone privacy protector for connection to a common exchange line and one of at least two telephone line operated devices sharing the line, the privacy protector comprising:
A privacy protecting jack for connection to a common exchange line and one of at least two telephone line operated devices sharing the line, the jack comprising:
Dependencies are inferred from the claim text.