Granted Patent
Utility
US 6,324,768 · App. 09/551,264
Ball lock punch retainer and checking gage system
Inventor:
Charles G. Wellman
Patented Case
View Patent ↗
Granted: Dec 4, 2001
Filed: Apr 18, 2000
Inventor
Charles G. Wellman
Assignee (at issue)
AIP 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.