Granted Patent
Utility
US 4,782,850 · App. 07/054,297
Travel stop for diaphragm regulator valve
Inventors:
John W. Duffy, Gregory Nichols
Patented Case
View Patent ↗
Granted: Nov 8, 1988
Filed: May 26, 1987
Inventors
John W. Duffy
Gregory Nichols
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.