Granted Patent
Utility
US 5,113,747 · App. 07/697,905
High pressure piston sealing system and method of its assembly
Inventor:
Herve Y. Pignerol
Patented Case
View Patent ↗
Granted: May 19, 1992
Filed: May 1, 1991
Inventor
Herve Y. Pignerol
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.