Granted Patent
Utility
US 4,858,638 · App. 07/269,297
Fast-acting quick release valve
Inventor:
Zoltan Cseri
Patented Case
View Patent ↗
Granted: Aug 22, 1989
Filed: Nov 10, 1987
Inventor
Zoltan Cseri
Assignee (at issue)
Sloan Valve 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.