Granted Patent
Utility
US 4,298,029 · App. 06/078,014
Pressure pulse dampener device
Inventor:
Abduz Zahid
Patented Case
View Patent ↗
Granted: Nov 3, 1981
Filed: Sep 24, 1979
Inventor
Abduz Zahid
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.