Granted Patent
Utility
US 4,551,973 · App. 06/437,230
Hydraulic power source and valve therefor
Inventor:
James H. Broadhead
Patented Case
View Patent ↗
Granted: Nov 12, 1985
Filed: Oct 28, 1982
Inventor
James H. Broadhead
Assignee (at issue)
Syntex (U.S.A.) LLC
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.