Granted Patent
Utility
US 5,794,656 · App. 08/635,099
Ball check valve with offset open ball movement
Inventor:
Michael K. Breslin
Patented Case
View Patent ↗
Granted: Aug 18, 1998
Filed: Apr 17, 1996
Inventor
Michael K. Breslin
Assignee (at issue)
Clean Environment Engineers, 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.