Granted Patent
Utility
US 4,450,489 · App. 06/334,945
Floating disc photoconductive film reader
Inventors:
James David Russell Barry, Joseph M. Denney
Patented Case
View Patent ↗
Granted: May 22, 1984
Filed: Dec 28, 1981
Inventors
James David Russell Barry
Joseph M. Denney
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.