Granted Patent
Utility
US 4,418,888 · App. 06/271,281
Angle cock valve
Inventors:
Irvin D. Jacobson, Frank R. Volgstadt, David P. Passerell
Patented Case
View Patent ↗
Granted: Dec 6, 1983
Filed: Jun 8, 1981
Inventors
Irvin D. Jacobson
Frank R. Volgstadt
David P. Passerell
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.