Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Security door knob and escutcheon

Security door knob and escutcheon

US Patent 4640112 · Granted Feb 3, 1987

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Deadlocked latch having disc and motor actuators1987
Trigger and latch bolt assembly1987
Door position monitor with automatic adjustment1986
Lock mechanism1984
Door position monitoring assembly1982
Lock mechanism1980
Electric strike1980