Granted Patent
Utility
US 4,706,929 · App. 06/938,824
Pneumatically operated valve with manual override and lockout
Inventors:
William S. Kalaskie, David E. Hughes
Patented Case
View Patent ↗
Granted: Nov 17, 1987
Filed: Dec 8, 1986
Inventors
William S. Kalaskie
David E. Hughes
Assignee (at issue)
Stanley G. Flagg & Co.
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.