Granted Patent
Utility
US 4,360,038 · App. 06/178,692
Magnetically-operated valve
Inventor:
Joseph C. Trinkwalder, Jr.
Patented Case
View Patent ↗
Granted: Nov 23, 1982
Filed: Aug 18, 1980
Inventor
Joseph C. Trinkwalder, Jr.
Assignee (at issue)
Sherwood Selpac Corp.
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.