Granted Patent
Utility
US 4,848,186 · App. 07/137,480
Dual hydrostatic drive transmission
Inventors:
Robert J. Dorgan, David A. Wallace
Patented Case
View Patent ↗
Granted: Jul 18, 1989
Filed: Dec 23, 1987
Inventors
Robert J. Dorgan
David A. Wallace
Assignee (at issue)
General Electric Company
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.