Granted Patent
Utility
US 5,232,020 · App. 07/906,409
Shutoff valve having a unitary valve body
Inventors:
Jeffrey T. Mason, Bradley R. Mason
Patented Case
View Patent ↗
Granted: Aug 3, 1993
Filed: Jul 1, 1992
Inventors
Jeffrey T. Mason
Bradley R. Mason
Assignee (at issue)
Breg, Inc.
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.