Granted Patent
Utility
US 5,121,562 · App. 07/681,576
Framework for maintained levelness of a plow blade
Inventor:
Richard Feller
Patented Case
View Patent ↗
Granted: Jun 16, 1992
Filed: Apr 5, 1991
Inventor
Richard Feller
Assignee (at issue)
Monroe Truck Equipment, 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.