Inventor
ELLSON GEORGE A
US6 patents
⚠️ This page may combine multiple inventors who share the name “ELLSON GEORGE A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SUPRA PROD INC
5 patentsUS4914732AApr 3, 1990
Electronic key with interactive graphic user interface
SUPRA PROD INC267 citations97
US4766746AAug 30, 1988
Electronic real estate lockbox system
SUPRA PROD INC195 citations97
US4929880AMay 29, 1990
Electronic lock system with battery conservation features
SUPRA PROD INC65 citations95
US4947163AAug 7, 1990
Electronic security system with configurable key
SUPRA PROD INC94 citations93
US4896246AJan 23, 1990
Electronic lock with energy conservation features
SUPRA PROD INC44 citations91