Granted Patent
Utility
US 6,142,538 · App. 09/123,262
Stab-type coupling with conduit inner diameter seal
Inventors:
Frank R. Volgstadt, Steven Passerell, James Lorenz
Patented Case
View Patent ↗
Granted: Nov 7, 2000
Filed: Jul 28, 1998
Inventors
Frank R. Volgstadt
Steven Passerell
James Lorenz
Assignee (at issue)
Perfection Holdings 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.