Granted Patent
Utility
US 5,010,915 · App. 07/534,442
Two stage automatic shut off valve
Inventors:
Bruce Johnson, Robert P. Whitney
Patented Case
View Patent ↗
Granted: Apr 30, 1991
Filed: Jun 6, 1990
Inventors
Bruce Johnson
Robert P. Whitney
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.