Granted Patent
Utility
US 4,164,639 · App. 05/878,281
Method of forming a pressure accumulator
Inventor:
Abduz Zahid
Patented Case
View Patent ↗
Granted: Aug 14, 1979
Filed: Feb 16, 1978
Inventor
Abduz Zahid
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.