Granted Patent
Utility
US 5,337,439 · App. 07/798,087
Headlamp cleaning unit for the front area of a motor vehicle
Inventors:
Wolfram Frey, Hans Trube
Patented Case
View Patent ↗
Granted: Aug 16, 1994
Filed: Nov 27, 1991
Inventors
Wolfram Frey
Hans Trube
Assignee (at issue)
MERCEDES-BENZ GROUP AG
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.