Granted Patent
Utility
US 4,878,265 · App. 07/241,917
Hold-open mechanism for use with a door closer
Inventor:
Lanny Nesbitt
Patented Case
View Patent ↗
Granted: Nov 7, 1989
Filed: Sep 7, 1988
Inventor
Lanny Nesbitt
Assignee (at issue)
Dorma Door Controls, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.