Granted Patent
Utility
US 5,331,266 · App. 07/903,307
Cooperative differential drive system
Inventors:
Glenn R. Widmann, Bruce S. Widmann
Patented Case
View Patent ↗
Granted: Jul 19, 1994
Filed: Jun 24, 1992
Inventors
Glenn R. Widmann
Bruce S. Widmann
Assignee (at issue)
Hughes Aircraft 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.