Granted Patent
Utility
US 4,831,493 · App. 07/138,751
Windshield moisture sensor
Inventors:
James F. Wilson, Harry S. Koontz, William E. Wagner, John Everhart, Glen E. Freeman, Harold E. Donley
Patented Case
View Patent ↗
Granted: May 16, 1989
Filed: Dec 28, 1987
Inventors
James F. Wilson
Harry S. Koontz
William E. Wagner
John Everhart
Glen E. Freeman
Harold E. Donley
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.