Granted Patent
Utility
US 4,931,688 · App. 07/145,418
Multifunction gas triode
Inventor:
Christopher H. Tosswill
Patented Case
View Patent ↗
Granted: Jun 5, 1990
Filed: Jan 19, 1988
Inventor
Christopher H. Tosswill
Assignee (at issue)
Galileo Electro-Optics 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.