Granted Patent
Utility
US 6,142,485 · App. 09/303,502
Chuck for rotary tools
Inventors:
Gebhard Muller, Michael Schuffenhauer, Martin Prey
Patented Case
View Patent ↗
Granted: Nov 7, 2000
Filed: Apr 30, 1999
Inventors
Gebhard Muller
Michael Schuffenhauer
Martin Prey
Assignee (at issue)
KENNAMETAL 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.