Granted Patent
Utility
US 4,729,436 · App. 06/910,115
Ball and disc over-speed shut-off mechanism for a rotary pneumatic tool
Inventors:
German Amador, Paul A. Biek
Patented Case
View Patent ↗
Granted: Mar 8, 1988
Filed: Sep 19, 1986
Inventors
German Amador
Paul A. Biek
Assignee (at issue)
Dresser Industries, Inc.
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.