Granted Patent
Utility
US 4,526,201 · App. 06/439,057
Four-way valve with internal pilot
Inventors:
Arthur H. Geyler, Jr., Ted L. Teach
Patented Case
View Patent ↗
Granted: Jul 2, 1985
Filed: Nov 4, 1982
Inventors
Arthur H. Geyler, Jr.
Ted L. Teach
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.