Granted Patent
Utility
US 5,044,709 · App. 07/278,083
LED array polarized image source/0 degree hologram virtual image head up display
Inventors:
Ronald T. Smith, Mark McDonald
Patented Case
View Patent ↗
Granted: Sep 3, 1991
Filed: Nov 30, 1988
Inventors
Ronald T. Smith
Mark McDonald
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.