Granted Patent
Utility
US 4,502,249 · App. 06/519,498
Doorway structure
Inventor:
Dennis W. Banford
Patented Case
View Patent ↗
Granted: Mar 5, 1985
Filed: Aug 2, 1983
Inventor
Dennis W. Banford
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.