Patent ID: 6956495

Claim:
A receiver for an automatic door assembly having a door and an actuator coupled to the receiver for automatically opening and closing the door in response to an activation signal, said receiver comprising: a receiver circuit for receiving hopping code control signal from a plurality of remote transmitters, the hopping code control signals each including a fixed serial number unique to the remote transmitter from which the control signal is transmitted, and a hopping code that changes with each transmission from the remote transmitter; a memory in which a table is stored, said table including pairs of serial numbers and hopping codes of hopping code control signals as received from the plurality of remote transmitters; and a control circuit coupled to the actuator, said memory, and said receiver circuit, wherein said control circuit is configured to determine whether the serial number and the hopping code of any received hopping code control signal corresponds to one of the pairs of serial numbers and hopping codes previously stored in said table, said control circuit supplies the activation signal to the actuator when any received hopping code control signal has a serial number and hopping code pair that does not correspond to a serial number and hopping code pair previously stored in said table.