Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Door closer

Door closer

US Patent 4660250 · Granted Apr 28, 1987

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Cutting tool for a lock cylinder1994
Locking arrangement consisting of key and lock cylinder1994
Lock cylinder1993
Lock with facility for preventing unauthorized entry1992
Lock cylinder with electromagnetic tumbler1991
Door check1988
Door check1987
Automatic door lock1986