Granted Patent
Utility
US 5,423,348 · App. 08/129,696
Shut-in spray gun for high pressure water blast cleaning
Inventors:
Paul D. Jezek, J. Edward Stachowiak
Patented Case
View Patent ↗
Granted: Jun 13, 1995
Filed: Sep 30, 1993
Inventors
Paul D. Jezek
J. Edward Stachowiak
Assignee (at issue)
J. Edward Stachowiak
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.