Granted Patent
Utility
US 5,657,929 · App. 08/583,343
Air-liquid system for cleaning vehicle headlight lens and similar surfaces
Inventors:
Mark W. DeWitt, Dennis R. Partlow
Patented Case
View Patent ↗
Granted: Aug 19, 1997
Filed: Jan 5, 1996
Inventors
Mark W. DeWitt
Dennis R. Partlow
Assignee (at issue)
Sprague Controls, 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.