Granted Patent
Utility
US 5,149,406 · App. 07/389,208
Electrical field quenching of optical breakdown
Inventors:
Ruth Ann Mullen, Robert W. Hellwarth
Patented Case
View Patent ↗
Granted: Sep 22, 1992
Filed: Aug 3, 1989
Inventors
Ruth Ann Mullen
Robert W. Hellwarth
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.