Granted Patent
Utility
US 5,419,739 · App. 08/128,544
Flap-type pressure relief valve and method of forming the same
Inventor:
Jeffrey C. Lewis
Patented Case
View Patent ↗
Granted: May 30, 1995
Filed: Sep 28, 1993
Inventor
Jeffrey C. Lewis
Assignee (at issue)
TRW Limited
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.