Granted Patent
Utility
US 4,628,416 · App. 06/729,983
Variable spot size illuminator with constant convergence angle
Inventor:
David A. Dewey
Patented Case
View Patent ↗
Granted: Dec 9, 1986
Filed: May 3, 1985
Inventor
David A. Dewey
Assignee (at issue)
Coopervision, Inc
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.