Inventor · disambiguated record
Andrew D. G. Stewart
Also filed as: STEWART ANDREW D G · STEWART ANDREW DAVID GARRY
12 granted patents·407 citations·filing 1981–1999
93Inventor 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
- 0286US5351117ASensing a narrow frequency band and gemstonesGERSAN ETS·Filed 1993·Granted Sep 27, 1994·60 cites·15 claims
- 0378US4696358AWeighing a number of objects in successionDOERMAN ERYK S·Filed 1985·Granted Sep 29, 1987·33 cites·26 claims
- 0477US4916391ALVDT displacement sensor with signal noise reduction for use in weighing apparatusDOERMAN ERYK S·Filed 1989·Granted Apr 10, 1990·31 cites·7 claims
- 0577US4529305AExamining a gemstoneWELFORD WALTER T·Filed 1982·Granted Jul 16, 1985·38 cites·21 claims
- 0672US6391215B1Diamond markingGERSAN ETS·Filed 1998·Granted May 21, 2002·32 cites·75 claims
- 0771US4417564ACentering and working gemstonesLAWRENCE JOHN C·Filed 1981·Granted Nov 29, 1983·30 cites·11 claims
- 0869US4645922AIntegrating sphere arrangement for producing size-corrected color signalsSPANDREL ETS·Filed 1985·Granted Feb 24, 1987·25 cites·24 claims
- 0967US4461568AAssessing the color of gemstones and the likeWELBOURN CHRISTOPHER M·Filed 1981·Granted Jul 24, 1984·25 cites·15 claims
- 1046US5248877AMaking an elongate cut using high energy radiationGERSAN ANSTALT·Filed 1989·Granted Sep 28, 1993·9 cites·13 claims
- 1137US6707045B1Detector for ionising radiationFiled 1999·Granted Mar 16, 2004·7 cites·14 claims
- 1224US6493499B1Waveguide windowFiled 1999·Granted Dec 10, 2002·1 cites·25 claims
Join the waitlist — get patent alerts
Get an alert when Andrew D. G. Stewart files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →