Granted Patent
Utility
US 6,612,334 · App. 10/020,378
Gas shutoff valve having a positive open indicator
Inventors:
Daniel Korpanty, Christopher Lanza, Oliver Berry, William D. Siska
Patented Case
View Patent ↗
Granted: Sep 2, 2003
Filed: Dec 13, 2001
Inventors
Daniel Korpanty
Christopher Lanza
Oliver Berry
William D. Siska
Assignee (at issue)
Carleton Technologies, 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.