Granted Patent
Utility
US 4,388,560 · App. 06/266,772
Filament dispenser cathode
Inventors:
William P. Robinson, Hugh McNulty, Jr., Robert L. Seliger, Weldon S. Williamson
Patented Case
View Patent ↗
Granted: Jun 14, 1983
Filed: May 26, 1981
Inventors
William P. Robinson
Hugh McNulty, Jr.
Robert L. Seliger
Weldon S. Williamson
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.