Granted Patent
Utility
US 4,354,931 · App. 06/253,960
Check valve assembly with actuator
Inventors:
Aldo Allori, John A. Wilger, Thomas F. Reiff
Patented Case
View Patent ↗
Granted: Oct 19, 1982
Filed: Apr 13, 1981
Inventors
Aldo Allori
John A. Wilger
Thomas F. Reiff
Assignee (at issue)
International Harvester Company
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.