Granted Patent
Utility
US 5,203,856 · App. 07/855,964
Tool for finishing and chamfering a hole
Inventor:
Raymond A. Stephens
Patented Case
View Patent ↗
Granted: Apr 20, 1993
Filed: Mar 23, 1992
Inventor
Raymond A. Stephens
Assignee (at issue)
GTE Valenite Corporation
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.