Granted Patent
Utility
US 5,775,880 · App. 08/619,074
Valve disabler for use in high pressure pipe cleaning systems
Inventors:
David G. Vensland, Edward P. Murphy
Patented Case
View Patent ↗
Granted: Jul 7, 1998
Filed: Mar 20, 1996
Inventors
David G. Vensland
Edward P. Murphy
Assignee (at issue)
Hypro, LLC
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.