Granted Patent
Utility
US 3,987,623 · App. 05/651,888
Controlled priority fluid system of a crawler type vehicle
Inventor:
Donald L. Bianchetta
Patented Case
View Patent ↗
Granted: Oct 26, 1976
Filed: Jan 23, 1976
Inventor
Donald L. Bianchetta
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.