Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Door closer for the non-fire side of a fire-door safety installation

Door closer for the non-fire side of a fire-door safety installation

US Patent 5709009 · Granted Jan 20, 1998

Estimated economic value: $19,288,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Pinion cap2000
Door closer2000
Door closer2000
Door closer for the non-fire side of a fire-door safety installation1999
Door closer for the non-fire side of a fire-door safety installation1999
Door closer for the non-fire side of a fire-door safety installation1999
Self-trimming shield for a door heel1993
Door security track1992
Door closer position monitor1990
Door position indicator for a door closer1989
Releasable hold-open device for a door closer1985
Brake apparatus1984