Inventor · disambiguated record
Keith N. Prettyjohns
Also filed as: PRETTYJOHNS KEITH N · PRETTYJOHNS KEITH NEIL
4 granted patents·256 citations·filing 1985–1997
81Inventor score
Top patents by PatentIndex Score
4 records- 0194US4639139AOptical profiler using improved phase shifting interferometryWYKO CORP·Filed 1985·Granted Jan 27, 1987·146 cites·24 claims
- 0285US5774214AMulti-mode imaging apparatus for radiation-emitting or absorbing samplesPHOTOMETRICS LTD·Filed 1996·Granted Jun 30, 1998·85 cites·19 claims
- 0342US5818571AApparatus with off-axis light path for characterizing the luminous intensity of lampPHOTOMETRICS LTD·Filed 1997·Granted Oct 6, 1998·14 cites·11 claims
- 0438US5729336AApparatus and method for characterizing the luminous intensity of a lamp using a curved mirror and curved screenPHOTOMETRICS LTD·Filed 1996·Granted Mar 17, 1998·11 cites·14 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →