Granted Patent
Utility
US 4,237,986 · App. 05/952,768
Flexible rock guard for bulldozer
Inventor:
Claude M. Frisbee
Patented Case
View Patent ↗
Granted: Dec 9, 1980
Filed: Oct 19, 1978
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.