Granted Patent
Utility
US 5,818,571 · App. 08/834,628
Apparatus with off-axis light path for characterizing the luminous intensity of lamp
Inventors:
Keith N. Prettyjohns, Stephen L. Marcus, Stephen F. Sagan
Patented Case
View Patent ↗
Granted: Oct 6, 1998
Filed: Apr 14, 1997
Inventors
Keith N. Prettyjohns
Stephen L. Marcus
Stephen F. Sagan
Assignee (at issue)
Photometrics, Ltd.
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.