Granted Patent
Utility
US 4,471,805 · App. 06/320,592
Control valve
Inventors:
James C. Solie, James I. Masterman, Michael T. Landrum, Larry D. Allard
Patented Case
View Patent ↗
Granted: Sep 18, 1984
Filed: Nov 12, 1981
Inventors
James C. Solie
James I. Masterman
Michael T. Landrum
Larry D. Allard
Assignee (at issue)
Owatonna Tool 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.