Granted Patent
Utility
US 4,603,389 · App. 06/466,815
Three cue flight director system for helicopters
Inventors:
Carl D. Griffith, Edmund R. Skutecki
Patented Case
View Patent ↗
Granted: Jul 29, 1986
Filed: Feb 16, 1983
Inventors
Carl D. Griffith
Edmund R. Skutecki
Assignee (at issue)
Sperry Corp.
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.