Granted Patent
Utility
US 4,879,501 · App. 06/448,648
Constant speed hydrostatic drive system
Inventor:
Lambert Haner
Patented Case
View Patent ↗
Granted: Nov 7, 1989
Filed: Dec 10, 1982
Inventor
Lambert Haner
Assignee (at issue)
Commercial Shearing, Inc.
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.