Granted Patent
Utility
US 4,952,809 · App. 07/215,507
Imaging system
Inventor:
Robert K. McEwen
Patented Case
View Patent ↗
Granted: Aug 28, 1990
Filed: Jul 6, 1988
Inventor
Robert K. McEwen
Assignee (at issue)
GEC-Marconi Ltd.
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.