Granted Patent
Utility
US 4,909,521 · App. 06/371,531
Chuck having gripping and locating sensors
Inventor:
George J. Ovanin
Patented Case
View Patent ↗
Granted: Mar 20, 1990
Filed: Apr 26, 1982
Inventor
George J. Ovanin
Assignee (at issue)
The S-P Manufacturing Corporation
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.