Granted Patent
Utility
US 4,416,189 · App. 06/390,477
Fully compensated fluid control valve
Inventor:
Tadeusz Budzich
Patented Case
View Patent ↗
Granted: Nov 22, 1983
Filed: Jun 21, 1982
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.