Granted Patent
Utility
US 5,232,417 · App. 07/995,346
Differential drive
Inventors:
Peter Amborn, Wolfgang Hildebrandt
Patented Case
View Patent ↗
Granted: Aug 3, 1993
Filed: Dec 22, 1992
Inventors
Peter Amborn
Wolfgang Hildebrandt
Assignee (at issue)
Viscodrive GmbH
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.