Granted Patent
Utility
US 5,019,752 · App. 07/207,603
Plasma switch with chrome, perturbated cold cathode
Inventor:
Robert W. Schumacher
Patented Case
View Patent ↗
Granted: May 28, 1991
Filed: Jun 16, 1988
Inventor
Robert W. Schumacher
Assignee (at issue)
Hughes Aircraft 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.