Granted Patent
Utility
US 5,349,984 · App. 08/008,452
Check valve
Inventors:
Jacek M. Weinheimer, Michael T. Taylor, Terrence C. Allen
Patented Case
View Patent ↗
Granted: Sep 27, 1994
Filed: Jan 25, 1993
Inventors
Jacek M. Weinheimer
Michael T. Taylor
Terrence C. Allen
Assignee (at issue)
Halkey-Roberts Corporation
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.