Inventor · disambiguated record
Donald H. Stedman
Also filed as: STEDMAN DONALD H · STEDMAN DONALD HUGH
32 granted patents·4 pending applications·1,240 citations·filing 1979–2013
98Inventor score
Files withENVIRONMENTAL SYST PROD8COLORADO SEMINARY4ENVIROTEST SYSTEMS HOLDINGS CORP4SIEVERS INSTR INC4STEDMAN DONALD H3
Top patents by PatentIndex Score
36 records- 0194US5319199AApparatus for remote analysis of vehicle emissionsCOLORADO SEMINARY·Filed 1992·Granted Jun 7, 1994·110 cites·29 claims
- 0294US5210702AApparatus for remote analysis of vehicle emissionsCOLORADO SEMINARY·Filed 1990·Granted May 11, 1993·149 cites·18 claims
- 0393US8429957B2System and method for quantifying the presence of components in the exhaust of commercial and/or heavy-duty vehiclesSTEDMAN DONALD H·Filed 2012·Granted Apr 30, 2013·13 cites·45 claims
- 0493US5401967AApparatus for remote analysis of vehicle emissionsCOLORADO SEMINARY DBA UNIVERSI·Filed 1994·Granted Mar 28, 1995·183 cites·18 claims
- 0592US8266952B2System and method for quantifying the presence of components in the exhaust of commercial and/or heavy-duty vehiclesSTEDMAN DONALD H·Filed 2011·Granted Sep 18, 2012·11 cites·42 claims
- 0692US7930931B2System and method for quantifying the presence of components in the exhaust of commercial and/or heavy-duty vehiclesENVIRONMENTAL SYST PROD·Filed 2008·Granted Apr 26, 2011·15 cites·21 claims
- 0791US8838396B2Remote vehicle emissions sensing system and method for differentiating water from hydrocarbonsENVIROTEST SYSTEMS HOLDINGS CORP·Filed 2013·Granted Sep 16, 2014·12 cites·7 claims
- 0890US8347701B2System and method for quantifying the presence of components in the exhaust of commercial and/or heavy-duty vehiclesENVIROTEST SYSTEMS HOLDINGS CORP·Filed 2011·Granted Jan 8, 2013·8 cites·25 claims
- 0990US5498872AApparatus for remote analysis of vehicle emissionsCOLORADO SEMINARY·Filed 1995·Granted Mar 12, 1996·112 cites·18 claims
- 1090US5489777AApparatus for remote analysis of vehicle emissions using reflective thermographyDENVER SEMINARY·Filed 1995·Granted Feb 6, 1996·135 cites·25 claims
- 1189US7164132B2Multilane remote sensing deviceENVIROTEST SYSTEMS CORP·Filed 2001·Granted Jan 16, 2007·46 cites·34 claims
- 1289US5371367ARemote sensor device for monitoring motor vehicle exhaust systemsENVIROTEST SYSTEMS CORP·Filed 1993·Granted Dec 6, 1994·78 cites·11 claims
- 1387US7359804B2System and method for calibrating remote emissions sensing instrumentsENVIRONMENTAL SYST PROD·Filed 2005·Granted Apr 15, 2008·15 cites·14 claims
- 1487US6560545B2System and method for remote analysis of small engine vehicle emissionsENVIRONMENTAL SYST PROD·Filed 2000·Granted May 6, 2003·28 cites·18 claims
- 1585US7400398B2Remote emissions sensing system and method incorporating spectral matching by data interpolationENVIRONMENTAL SYST PROD·Filed 2006·Granted Jul 15, 2008·10 cites·19 claims
- 1685US6701256B2Exhaust opacity measuring deviceENVIRONMENTAL SYST PROD·Filed 2002·Granted Mar 2, 2004·20 cites·8 claims
- 1784US8447528B2Remote vehicle emissions sensing system and method for differentiating water from hydrocarbonsGENTALA ROBERT ALLEN·Filed 2009·Granted May 21, 2013·14 cites·11 claims
- 1880US6671630B2System and method for remote analysis of small engine vehicle emissionsENVIRONMENTAL SYST PROD·Filed 2003·Granted Dec 30, 2003·17 cites·18 claims
- 1979US4765961AApparatus for detection of certain nitrogen-containing gases using chemiluminescenceUNIV MICHIGAN·Filed 1984·Granted Aug 23, 1988·36 cites·9 claims
- 2076US7016789B2Exhaust opacity measuring deviceENVIRONMENTAL SYST PROD·Filed 2004·Granted Mar 21, 2006·10 cites·6 claims
- 2171US9057664B2System and method for quantifying the presence of components in the exhaust of commercial and/or heavy-duty vehiclesENVIROTEST SYSTEMS HOLDINGS CORP·Filed 2013·Granted Jun 16, 2015·1 cites·45 claims
- 2271US5070246ASpectrometer for measuring the concentration of components in a fluid stream and method for using sameADA TECHNOLOGIES INC·Filed 1989·Granted Dec 3, 1991·31 cites·42 claims
- 2370US5424217AProcess for the detection of sulfurSIEVERS INSTR INC·Filed 1992·Granted Jun 13, 1995·28 cites·10 claims
- 2470US5227135AApparatus for simultaneous measurement of sulfur and non-sulfur containing compoundsSIEVERS RES INC·Filed 1991·Granted Jul 13, 1993·36 cites·7 claims
- 2568US4205956ANickel carbonyl analyzerINT NICKEL CO·Filed 1979·Granted Jun 3, 1980·19 cites·12 claims
- 2667US7274994B2Exhaust opacity measuring deviceENVIRONMENTAL SYST PROD·Filed 2005·Granted Sep 25, 2007·1 cites·3 claims
- 2763US5310683AProcess for simultaneous measurement of sulfur and non-sulfur containing compoundsSIEVERS RES INC·Filed 1991·Granted May 10, 1994·27 cites·10 claims
- 2861US5330714AProcess and apparatus for simultaneous measurement of sulfur and non-sulfur containing compoundsSIEVERS INSTR INC·Filed 1993·Granted Jul 19, 1994·23 cites·5 claims
- 2960US4678488ALiquid separator for gas analyzerSENSORS INC·Filed 1985·Granted Jul 7, 1987·21 cites·15 claims
- 3057US2013000396A1System and method for quantifying the presence of components in the exhaust of commercial and/or heavy-duty vehiclesSTEDMAN DONALD H·Filed 2012·Application pending·0 cites
- 3151US2014033796A1System and method for quantifying the presence of components in the exhaust of commercial and/or heavy-duty vehiclesENVIROTEST SYSTEMS HOLDINGS CORP·Filed 2013·Application pending·0 cites
- 3250US5935519AApparatus for the detection of sulfurSIEVERS INSTR INC·Filed 1997·Granted Aug 10, 1999·12 cites·23 claims
- 3341US5661036AProcess for the detection of sulfurSIEVERS INSTR INC·Filed 1995·Granted Aug 26, 1997·7 cites·11 claims
- 3440US5702954AMethod to detect phosphorusCOLORADO SEMINARY·Filed 1995·Granted Dec 30, 1997·12 cites·5 claims
- 3538US2003120434A1Exhaust opacity measuring deviceFiled 2002·Application pending·0 cites
- 3637US2002052698A1Exhaust opacity measuring deviceFiled 2001·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →