Granted Patent
Utility
US 5,113,900 · App. 07/648,549
Check valve with quick lock attachment feature
Inventor:
Major H. Gilbert
Patented Case
View Patent ↗
Granted: May 19, 1992
Filed: Jan 30, 1991
Inventor
Major H. Gilbert
Assignee (at issue)
Bridge Products, 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.