Patent ID: 8539715

Claim:
A radio frequency identification pet door, the pet door comprising: an RFID reader to read an RFID tag on a pet; a lock, coupled to said RFID reader, to control access through said pet door in response to an RFID signal from said RFID tag; wherein said RFID reader is able to read a pet identification code from both: i) a sub-dermal RFID tag; and ii) a collar-mounted RFID tag; and wherein a given pet has a collar-mounted RFID tag and a sub-dermal RFID tag; wherein said lock is controlled to selectively allow access of a pet with a said sub-dermal RFID tag, a pet with a collar-mounted RFID tag and said given pet with both said collar-mounted RFID tag and said sub-dermal RFID tag through said pet door responsive to a respective said pet-identification code read from the RFID tags; and wherein said sub-dermal RFID tag operates at a first frequency said collar-mounted RFID tag operates at a second, different frequency; wherein said first frequency is in the range of 125 KHz to 134 KHz; wherein said RFID reader has an RF communications bandwidth spanning both first and second frequencies; said RFID pet door further comprising: a frame mounting a moveable flap, wherein opening of said moveable flap is controlled by said lock; a tunnel attachment to said frame; and an antenna of said RFID reader mounted on or adjacent said tunnel; wherein said tunnel extends away from said moveable flap.