Granted Patent
Utility
US 4,466,697 · App. 06/320,576
Light dispersive optical lightpipes and method of making the same
Inventor:
Maurice Daniel
Patented Case
View Patent ↗
Granted: Aug 21, 1984
Filed: Nov 12, 1981
Inventor
Maurice Daniel
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.