Granted Patent
Utility
US 5,652,391 · App. 08/440,198
Double-diaphragm gauge protector
Inventors:
Kenji A. Kingsford, Anthony K. Chan
Patented Case
View Patent ↗
Granted: Jul 29, 1997
Filed: May 12, 1995
Inventors
Kenji A. Kingsford
Anthony K. Chan
Assignee (at issue)
Furon Company
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.