Granted Patent
Utility
US 4,653,012 · App. 06/640,970
Display systems
Inventors:
Edward Philip Duffy, Geoffrey B. Craggs, David McGlade
Patented Case
View Patent ↗
Granted: Mar 24, 1987
Filed: Aug 15, 1984
Inventors
Edward Philip Duffy
Geoffrey B. Craggs
David McGlade
Assignee (at issue)
Marconi Avionics Limited
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.