Granted Patent
Utility
US 4,933,227 · App. 07/292,057
Aircraft windshield
Inventor:
Sherman D. Stewart
Patented Case
View Patent ↗
Granted: Jun 12, 1990
Filed: Dec 30, 1988
Inventor
Sherman D. Stewart
Assignee (at issue)
PPG Industries, 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.