Granted Patent
Utility
US 4,428,401 · App. 06/407,564
Failure sensing hydraulic accumulator and system
Inventor:
Hugh H. Chun
Patented Case
View Patent ↗
Granted: Jan 31, 1984
Filed: Aug 12, 1982
Inventor
Hugh H. Chun
Assignee (at issue)
VSI, 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.