Granted Patent
Utility
US 4,711,512 · App. 06/754,406
Compact head-up display
Inventor:
Juris Upatnieks
Patented Case
View Patent ↗
Granted: Dec 8, 1987
Filed: Jul 12, 1985
Inventor
Juris Upatnieks
Assignee (at issue)
Environmental Research Institute
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.