Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Method and apparatus for closing a door

Method and apparatus for closing a door

US Patent 4709445 · Granted Dec 1, 1987

Estimated economic value: $175,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Induction sealing covers with tabs2000
Apparatus and system for on-the-go filling and sealing2000
Pneumatic door closer with sustained closing force during closure1990
Deadbolt lock for hinged doors1987
Door latching apparatus1986
Segmented door opener1986
Locking apparatus for use with a panel slideable in a plane1986
Locking apparatus for use with a panel slideable in a plane1986
Looped rod safety stop1984
Automatically locking crossbolt deadlock1982
Liquid filling and level sensing apparatus1982