Granted Patent
Utility
US 4,823,632 · App. 07/085,468
Gear box assembly
Inventors:
Lawrence R. Harrod, Michael R. Siebern
Patented Case
View Patent ↗
Granted: Apr 25, 1989
Filed: Aug 12, 1987
Inventors
Lawrence R. Harrod
Michael R. Siebern
Assignee (at issue)
Kransco
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.