Granted Patent
Utility
US 4,275,396 · App. 06/084,220
Helicopter rotating blade detection system
Inventor:
Omar J. Jacomini
Patented Case
View Patent ↗
Granted: Jun 23, 1981
Filed: Oct 12, 1979
Inventor
Omar J. Jacomini
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.