Granted Patent
Utility
US 4,558,536 · App. 06/608,417
Window construction
Inventor:
Forrest L. Dunsmoor
Patented Case
View Patent ↗
Granted: Dec 17, 1985
Filed: May 9, 1984
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.