Granted Patent
Utility
US 5,653,903 · App. 08/495,132
L-shaped heating element with radiused end for a windshield
Inventors:
Robert N. Pinchok, Harry S. Koontz
Patented Case
View Patent ↗
Granted: Aug 5, 1997
Filed: Jun 27, 1995
Inventors
Robert N. Pinchok
Harry S. Koontz
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.