Granted Patent
Utility
US 4,969,724 · App. 07/426,734
Helmet supported optical systems with four reflections
Inventor:
Stafford M. Ellis
Patented Case
View Patent ↗
Granted: Nov 13, 1990
Filed: Oct 24, 1989
Inventor
Stafford M. Ellis
Assignee (at issue)
GEC-Marconi Ltd.
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.