Granted Patent
Utility
US 4,543,997 · App. 06/577,850
Pressure accumulator
Inventor:
Masayuki Kishimoto
Patented Case
View Patent ↗
Granted: Oct 1, 1985
Filed: Feb 7, 1984
Inventor
Masayuki Kishimoto
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.