KP

Keith N. Prettyjohns

PH Photometrics: 3 patents #1 of 19Top 6%
WY Wyko: 1 patents #25 of 40Top 65%
📍 Tucson, AZ: #1,506 of 6,004 inventorsTop 30%
🗺 Arizona: #8,163 of 32,909 inventorsTop 25%
Overall (All Time): #1,285,320 of 4,157,543Top 35%
4
Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
5818571 Apparatus with off-axis light path for characterizing the luminous intensity of lamp Stephen L. Marcus, Stephen F. Sagan 1998-10-06
5774214 Multi-mode imaging apparatus for radiation-emitting or absorbing samples 1998-06-30
5729336 Apparatus and method for characterizing the luminous intensity of a lamp using a curved mirror and curved screen Stephen L. Marcus, Kevin Garcia 1998-03-17
4639139 Optical profiler using improved phase shifting interferometry James C. Wyant 1987-01-27