Granted Patent
Utility
US 6,293,174 · App. 08/695,213
Quick change drive for core cutters
Inventor:
Tim Rulseh
Patented Case
View Patent ↗
Granted: Sep 25, 2001
Filed: Jul 29, 1996
Inventor
Tim Rulseh
Assignee (at issue)
Production Solutions, 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.