P

Inventor

WELBOURN CHRISTOPHER M

GB7 patents
⚠️ This page may combine multiple inventors who share the name “WELBOURN CHRISTOPHER M”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

GERSAN ETS

4 patents
US5206699AApr 27, 1993

Sensing a narrow frequency band of radiation and gemstones

GERSAN ETS116 citations95
US5351117ASep 27, 1994

Sensing a narrow frequency band and gemstones

GERSAN ETS60 citations94
US5536943AJul 16, 1996

Method and apparatus for examining an object

GERSAN ETS28 citations91
US5177585AJan 5, 1993

P-n-p diamond transistor

GERSAN ETS2 citations61

SPANDREL ETS

2 patents
US4663522AMay 5, 1987

Integrating sphere device for measuring transmission of light in objects

SPANDREL ETS31 citations90
US4645922AFeb 24, 1987

Integrating sphere arrangement for producing size-corrected color signals

SPANDREL ETS25 citations90

WELBOURN CHRISTOPHER M

1 patent
US4461568AJul 24, 1984

Assessing the color of gemstones and the like

WELBOURN CHRISTOPHER M25 citations76