Granted Patent
Utility
US 4,995,949 · App. 07/265,934
Orifice sizing using chemical, electrochemical, electrical discharge machining, plating, coating techniques
Inventor:
Lawrence J. Rhoades
Patented Case
View Patent ↗
Granted: Feb 26, 1991
Filed: Nov 2, 1988
Inventor
Lawrence J. Rhoades
Assignee (at issue)
Extrude Hone 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.