Granted Patent
Utility
US 4,273,158 · App. 06/037,387
Pressure pulse dampening device
Inventor:
Hugh H. Chun
Patented Case
View Patent ↗
Granted: Jun 16, 1981
Filed: May 9, 1979
Inventor
Hugh H. Chun
Assignee (at issue)
Greer Hydraulics, Incorporated
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.