Granted Patent
Utility
US 4,795,942 · App. 07/043,575
Hollow cathode discharge device with front shield
Inventor:
George K. Yamasaki
Patented Case
View Patent ↗
Granted: Jan 3, 1989
Filed: Apr 27, 1987
Inventor
George K. Yamasaki
Assignee (at issue)
Westinghouse Electric Company LLC
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.