Granted Patent
Utility
US 4,624,566 · App. 06/722,973
Spectral analyzer and direction indicator
Inventors:
Gordon A. Shifrin, Jerome M. Welner
Patented Case
View Patent ↗
Granted: Nov 25, 1986
Filed: Apr 12, 1985
Inventors
Gordon A. Shifrin
Jerome M. Welner
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.