Granted Patent
Utility
US 4,883,025 · App. 07/153,262
Potential-magnetic energy driven valve mechanism
Inventor:
William E. Richeson
Patented Case
View Patent ↗
Granted: Nov 28, 1989
Filed: Feb 8, 1988
Inventor
William E. Richeson
Assignee (at issue)
Magnavox Government and Industrial Electronics 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.