Granted Patent
Utility
US 4,345,436 · App. 06/245,238
Control for load sharing pumps
Inventor:
Howard L. Johnson
Patented Case
View Patent ↗
Granted: Aug 24, 1982
Filed: Apr 7, 1980
Inventor
Howard L. Johnson
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.