Granted Patent
Utility
US 4,846,440 · App. 07/103,008
Valve with metal diaphragm and flat surface valve body
Inventors:
Lee R. Carlson, Mike Green, Mike Miller, Rudy Nissen, Steve Sheng
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: Sep 30, 1987
Inventors
Lee R. Carlson
Mike Green
Mike Miller
Rudy Nissen
Steve Sheng
Assignee (at issue)
Spectra-Physics, 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.