Granted Patent
Utility
US 4,744,572 · App. 07/073,401
All-metal, valve sealing mechanism
Inventors:
Bahman Sahba, Harry C. Champlin, Jr., John M. Cory
Patented Case
View Patent ↗
Granted: May 17, 1988
Filed: Jul 14, 1987
Inventors
Bahman Sahba
Harry C. Champlin, Jr.
John M. Cory
Assignee (at issue)
Posi-Seal International, 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.