Granted Patent
Utility
US 5,010,961 · App. 07/481,928
Angle-tilt-pitch mechanism for dozer blade
Inventor:
Claude M. Frisbee
Patented Case
View Patent ↗
Granted: Apr 30, 1991
Filed: Feb 20, 1990
Inventor
Claude M. Frisbee
Assignee (at issue)
J. I. Case Company
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.