Granted Patent
Utility
US 4,945,941 · App. 07/489,252
Means to reduce vibration in check valves and stop/check valves caused by pulsating low fluid flow
Inventor:
Erich J. Kocher
Patented Case
View Patent ↗
Granted: Aug 7, 1990
Filed: Mar 5, 1990
Inventor
Erich J. Kocher
Assignee (at issue)
Vilter Manufacturing LLC
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.