Granted Patent
Utility
US 4,301,622 · App. 06/163,698
Casement window operating mechanism
Inventor:
Forrest L. Dunsmoor
Patented Case
View Patent ↗
Granted: Nov 24, 1981
Filed: Jun 27, 1980
Inventor
Forrest L. Dunsmoor
Assignee (at issue)
Peachtree Doors, 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.