Circuit for preventing unauthorized access to phones

Electronic lock for coin telephones

Keyboard security device

Lock for pushbutton phone

Lockable telephone plug apparatus

Locking arrangement for a subscriber terminal device

Mechanical assembly for ensuring electrical safety in a telephon

Methods and apparatus for providing a secure telecommunications

Mounting for electronic accessories for vehicles

Prestone phone lock

Quick release latch mechanism for a telephone handset

Security bracket for portable telephones

Security device for a telephone instrument

Shield device for pushbutton telephone

Telephone interface security device

Telephone jack lock-out plug

Telephone line access control apparatus

Telephone line isolation device and method of use

Telephone lock

Telephone, telephone security control method, telephone...