Granted Patent
Utility
US 4,600,831 · App. 06/553,956
Apparatus to focus light on a surface based on color
Inventor:
Michael Christopher Hutley
Patented Case
View Patent ↗
Granted: Jul 15, 1986
Filed: Nov 21, 1983
Inventor
Michael Christopher Hutley
Assignee (at issue)
The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
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.