A cordless telephone including a base unit and a remote unit that are in wireless communication. The remote unit has a number keyboard whereby code numbers can be entered into the system. A pulse detecting network picks up and identifies the code numbers placed in the remote unit and, in response thereto,...http://www.google.ca/patents/US4508935?utm_source=gb-gplus-sharePatent US4508935 - Cordless telephone having a remote control function
