Patent ID: 7106170

Claim:
A garage door opener comprising; a plurality of radio frequency transmitters, each radio frequency transmitter capable of producing a non-user changeable radio frequency code signal where the radio frequency code signal from each transmitter is different; a radio frequency receiver adapted to receive radio frequency code signals from radio frequency transmitters; a processor for processing radio frequency code signals received by the receiver; a plurality of memories where there is a memory corresponding to each one of the radio frequency transmitters, each memory storing a code corresponding with the radio frequency code signal of each of the radio frequency transmitters; control structure for controlling operation of the garage door; the processing by the processor comprising; comparing a received radio frequency code with the code in each of the memories, and signaling the control structure to control operation of the garage door when the received radio frequency code is associated with the code in any one of the memories; wherein each of the memories is removable independently of the other memories; and wherein each of the memories is replaceable with another memory with a code in the memory associated with the different radio frequency code signal.