Inventor
CHANG JAMES S
US11 patents
⚠️ This page may combine multiple inventors who share the name “CHANG JAMES S”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CHAMBERLAIN GROUP INC
9 patentsUS5743046AApr 28, 1998
Jack shaft door garage operator
CHAMBERLAIN GROUP INC31 citations92
US4885872ADec 12, 1989
Garage door operator with plastic drive belt
CHAMBERLAIN GROUP INC25 citations92
US4794731AJan 3, 1989
Twin sprocket garage door opener
CHAMBERLAIN GROUP INC25 citations92
US5299678AApr 5, 1994
Limit switch mechanism for garage door opener
CHAMBERLAIN GROUP INC37 citations89
US5235494AAug 10, 1993
Electrical controller having pivotally mounted circuit board support
CHAMBERLAIN GROUP INC45 citations88
USRE40001EJan 15, 2008
Jack shaft garage door operator
CHAMBERLAIN GROUP INC16 citations83
US5176582AJan 5, 1993
Chain guide for overhead door opener
CHAMBERLAIN GROUP INC20 citations81
US5633778AMay 27, 1997
Infrared signal interface for use with barrier door operator
CHAMBERLAIN GROUP INC9 citations70
US5530300AJun 25, 1996
Extended range wired remote control circuit
CHAMBERLAIN GROUP INC1 citations43