Granted Patent
Utility
US 4,903,997 · App. 07/327,410
Roof flashing
Inventor:
David E. Kifer
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Mar 21, 1989
Inventor
David E. Kifer
Assignee (at issue)
OATEY CO.
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.