The present invention comprises a system for remote control of garage doors and other devices wherein an extremely large number of codes are available for remote transmitters for operating the garage operator and wherein each transmitter has its own unique and permanent nonuser changeable code. The receiver...http://www.google.fr/patents/USRE37986?utm_source=gb-gplus-shareBrevet USRE37986 - Coding system for multiple transmitters and a single receiver
Coding system for multiple transmitters and a single receiver
