Granted Patent
Utility
US 5,440,428 · App. 08/130,066
Automotive instrument 3-D virtual image display
Inventors:
Ronald G. Hegg, Mao-Jin Chern
Patented Case
View Patent ↗
Granted: Aug 8, 1995
Filed: Sep 30, 1993
Inventors
Ronald G. Hegg
Mao-Jin Chern
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.