Granted Patent
Utility
US 4,553,790 · App. 06/648,233
Flexible dirt guard with back-up plate for track-type vehicle
Inventor:
Roger L. Boggs
Patented Case
View Patent ↗
Granted: Nov 19, 1985
Filed: Jan 29, 1982
Inventor
Roger L. Boggs
Assignee (at issue)
Caterpillar Tractor Co.
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.