Inventor
CRIMMINS TERENCE E
US5 patents
Patents
5 patentsUS6181255B1Jan 30, 2001
Multi-frequency radio frequency transmitter with code learning capability
CHAMBERLAIN GROUP INC222 citations98
US6822603B1Nov 23, 2004
Method and apparatus for transmitting a plurality of different codes at a plurality of different frequencies
CHAMBERLAIN GROUP INC84 citations96
US6184641B1Feb 6, 2001
Controller for a door operator
CHAMBERLAIN GROUP INC85 citations95
US6014307AJan 11, 2000
Fire door operator having an integrated electronically controlled descent device
CHAMBERLAIN GROUP INC112 citations95
US6696806B2Feb 24, 2004
Method and apparatus for facilitating control of a movable barrier operator
CHAMBERLAIN GROUP INC22 citations85