Granted Patent
Utility
US 4,401,182 · App. 06/214,927
Variable displacement hydraulic drive with disconnect
Inventor:
Frederic W. Pollman
Patented Case
View Patent ↗
Granted: Aug 30, 1983
Filed: Dec 10, 1980
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.