Granted Patent
Utility
US 4,715,901 · App. 06/776,934
Architectural product
Inventor:
Douglas A. Granger
Patented Case
View Patent ↗
Granted: Dec 29, 1987
Filed: Sep 17, 1985
Inventor
Douglas A. Granger
Assignee (at issue)
Aluminum Company of America
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.