Granted Patent
Utility
US 5,112,131 · App. 07/509,295
Controlled machining of combustion chambers, gears and other surfaces
Inventor:
Timothy R. Pryor
Patented Case
View Patent ↗
Granted: May 12, 1992
Filed: Apr 16, 1990
Inventor
Timothy R. Pryor
Assignee (at issue)
Diffracto, Ltd.
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.