Protection apparatus applied to a telephone line

Protection circuit and a node for a communications system using

Protection circuit for a digital subscriber line device

Protection circuit for a subscriber line interface circuit

Protection circuit for railroad signaling high voltage surge pro

Protection circuit for signal and power

Protection circuitry for a subscriber line interface circuit...

Protection device for a terminal that can be connected to a...

Protection device for communication

Protection device: surge suppressing conductor

Protection devices and methods for preventing the flow of...

Protection devices and methods for preventing the flow of...

Protection of a communication line

Protection of double end exposed systems

Protection of double end exposed systems

Protection of sensitive electrical installations against the eff

Protection patch panel

Protection plug

Protection relay

Protective boot for a high voltage circuit interrupter