Granted Patent
Utility
US 6,206,028 · App. 09/596,832
Universal multi-path control valve system
Inventors:
R. Stuart Holden, Jr., Richard E. Marzec, Frank Pieters
Patented Case
View Patent ↗
Granted: Mar 27, 2001
Filed: Jun 19, 2000
Inventors
R. Stuart Holden, Jr.
Richard E. Marzec
Frank Pieters
Assignee (at issue)
THE KEENEY MANUFACTURING COMPANY
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.