Granted Patent
Utility
US 4,488,474 · App. 06/458,508
Fully compensated fluid control valve
Inventor:
Tadeusz Budzich
Patented Case
View Patent ↗
Granted: Dec 18, 1984
Filed: Jan 17, 1983
Inventor
Tadeusz Budzich
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.