Granted Patent
Utility
US 5,141,019 · App. 07/725,281
Two stage automatic shutoff valve
Inventors:
Leo J. LeBlanc, Bruce Johnson
Patented Case
View Patent ↗
Granted: Aug 25, 1992
Filed: Jul 3, 1991
Inventors
Leo J. LeBlanc
Bruce Johnson
Assignee (at issue)
EBW, 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.