Granted Patent
Utility
US 4,764,009 · App. 07/069,781
Means for extending spectral response of spectral analyzing direction indicating apparatus
Inventor:
Gordon A. Shifrin
Patented Case
View Patent ↗
Granted: Aug 16, 1988
Filed: Jul 6, 1987
Inventor
Gordon A. Shifrin
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.