Inventor · disambiguated record
Christopher M. Welbourn
Also filed as: WELBOURN CHRISTOPHER · WELBOURN CHRISTOPHER M · WELBOURN CHRISTOPHER MARK
12 granted patents·535 citations·filing 1981–1997
94Inventor score
Top patents by PatentIndex Score
12 records- 0195US5206699ASensing a narrow frequency band of radiation and gemstonesGERSAN ETS·Filed 1991·Granted Apr 27, 1993·116 cites·91 claims
- 0286US5883389ADistinguishing natural from synthetic diamondsFiled 1994·Granted Mar 16, 1999·76 cites·17 claims
- 0386US5351117ASensing a narrow frequency band and gemstonesGERSAN ETS·Filed 1993·Granted Sep 27, 1994·60 cites·15 claims
- 0483US6014208AExamining a diamondGERSAN ETS·Filed 1996·Granted Jan 11, 2000·67 cites·36 claims
- 0581US5801819ADistinguishing natural from synthetic diamondGERSAN ETS·Filed 1995·Granted Sep 1, 1998·64 cites·19 claims
- 0671US4663522AIntegrating sphere device for measuring transmission of light in objectsSPANDREL ETS·Filed 1985·Granted May 5, 1987·31 cites·32 claims
- 0769US4645922AIntegrating sphere arrangement for producing size-corrected color signalsSPANDREL ETS·Filed 1985·Granted Feb 24, 1987·25 cites·24 claims
- 0867US4461568AAssessing the color of gemstones and the likeWELBOURN CHRISTOPHER M·Filed 1981·Granted Jul 24, 1984·25 cites·15 claims
- 0966US5536943AMethod and apparatus for examining an objectGERSAN ETS·Filed 1993·Granted Jul 16, 1996·28 cites·32 claims
- 1060US5835200AMethod and apparatus for examining an objectGERSAN ETS·Filed 1997·Granted Nov 10, 1998·24 cites·29 claims
- 1152US5880504AExamining a diamondGERSAN ETS·Filed 1995·Granted Mar 9, 1999·17 cites·5 claims
- 1231US5177585AP-n-p diamond transistorGERSAN ETS·Filed 1990·Granted Jan 5, 1993·2 cites·12 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →