Granted Patent
Utility
US 6,043,933 · App. 08/975,615
Split optical element and a low cost fabrication approach
Inventor:
Kok-Wai Chang
Patented Case
View Patent ↗
Granted: Mar 28, 2000
Filed: Nov 21, 1997
Inventor
Kok-Wai Chang
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.