Granted Patent
Utility
US 4,938,490 · App. 07/331,088
Drawback collet
Inventor:
Ronald P. Bosek
Patented Case
View Patent ↗
Granted: Jul 3, 1990
Filed: Mar 27, 1989
Inventor
Ronald P. Bosek
Assignee (at issue)
GTE Valenite 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.