Granted Patent
Utility
US 5,213,828 · App. 07/857,144
Heatable windshield
Inventors:
John A. Winter, Bruce A. Bartrug
Patented Case
View Patent ↗
Granted: May 25, 1993
Filed: Mar 25, 1992
Inventors
John A. Winter
Bruce A. Bartrug
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.