Granted Patent
Utility
US 4,478,041 · App. 06/294,640
Hydraulic motor control
Inventor:
Frederic W. Pollman
Patented Case
View Patent ↗
Granted: Oct 23, 1984
Filed: Aug 20, 1981
Inventor
Frederic W. Pollman
Assignee (at issue)
Sundstrand Corporation
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.