Granted Patent
Utility
US 4,880,978 · App. 07/275,878
Resonant radiation protector
Inventors:
David B. Cohn, Gregory R. Sasaki
Patented Case
View Patent ↗
Granted: Nov 14, 1989
Filed: Nov 25, 1988
Inventors
David B. Cohn
Gregory R. Sasaki
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.