Granted Patent
Utility
US 4,962,997 · App. 07/184,459
Three color separation using subtractive dichroic beamsplitters
Inventor:
Richard R. Baldwin
Patented Case
View Patent ↗
Granted: Oct 16, 1990
Filed: Apr 21, 1988
Inventor
Richard R. Baldwin
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.