Granted Patent
Utility
US 5,271,601 · App. 07/921,518
Regulator valve with diaphragm support
Inventors:
William J. Bonzer, John W. Duffy, Douglas C. Pfantz, Gary L. Scott, William H. Earney, Robert D. Gaskill
Patented Case
View Patent ↗
Granted: Dec 21, 1993
Filed: Jul 29, 1992
Inventors
William J. Bonzer
John W. Duffy
Douglas C. Pfantz
Gary L. Scott
William H. Earney
Robert D. Gaskill
Assignee (at issue)
Fisher Controls International 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.