Inventor
Keith N. Prettyjohns
Inventor
Tucson, AZ, US
Overview
Patents· 4 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G01Jprimary
G01JMeasurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light50%
G01BMeasuring length, thickness or similar linear dimensions25%
G01NInvestigating or analysing materials by determining their chemical or physical properties25%
PatentTitleYear
5,818,571'Apparatus with off-axis light path for characterizing the luminous intensity of lamp'19985,774,214'Multi-mode imaging apparatus for radiation-emitting or absorbing samples'19985,729,336'Apparatus and method for characterizing the luminous intensity of a lamp using a curved mirror and curved screen'19984,639,139'Optical profiler using improved phase shifting interferometry'1987Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1987Patents assigned to WYKO CORP (1)· patent assignee history
1987–1998Based in Tucson, AZ, US· patent location history
1998Patents assigned to PHOTOMETRICS LTD (3)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| PHOTOMETRICS LTD | 3 | 1998 |
| WYKO CORP | 1 | 1987 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tucson, AZ, US | 4 | 1987–1998 |