Granted Patent
Utility
US 4,435,979 · App. 06/394,855
Apparatus for testing valve actuators
Inventor:
William H. Gilgore
Patented Case
View Patent ↗
Granted: Mar 13, 1984
Filed: Jul 2, 1982
Inventor
William H. Gilgore
Assignee (at issue)
Allis-Chalmers Corporation
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.