Granted Patent
Utility
US 4,936,337 · App. 07/122,630
Armature for a solenoid operated valve
Inventor:
Michael R. DuHack
Patented Case
View Patent ↗
Granted: Jun 26, 1990
Filed: Nov 19, 1987
Inventor
Michael R. DuHack
Assignee (at issue)
Emhart Industries, 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.