Granted Patent
Utility
US 4,407,564 · App. 06/237,401
Head-up displays
Inventor:
Stafford M. Ellis
Patented Case
View Patent ↗
Granted: Oct 4, 1983
Filed: Jan 21, 1981
Inventor
Stafford M. Ellis
Assignee (at issue)
Elliott Brothers (London) 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.