Granted Patent
Utility
US 4,597,511 · App. 06/388,434
Positive one-way check valve
Inventor:
Anthony Licari
Patented Case
View Patent ↗
Granted: Jul 1, 1986
Filed: Jun 14, 1982
Inventor
Anthony Licari
Assignee (at issue)
AFA Consolidated 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.