Granted Patent
Utility
US 5,330,155 · App. 07/787,835
Pressure-loaded cylinder valve insert
Inventor:
David M. Lechner
Patented Case
View Patent ↗
Granted: Jul 19, 1994
Filed: Nov 5, 1991
Inventor
David M. Lechner
Assignee (at issue)
HARSCO CORPORATION
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.