Assignee
WELKER ENG
US·55 granted patents·1,135 citations·filing 1981–2005
Top patents by PatentIndex Score
55 records- 0194US7156123B2Pressure reduction system for quick-connectsWELKER ENG·Filed 2005·Granted Jan 2, 2007·32 cites·6 claims
- 0293US6338359B1Dual automatic insertion deviceWELKER ENG·Filed 2000·Granted Jan 15, 2002·54 cites·10 claims
- 0392US4631967AAutomatic insertion deviceWELKER ENG·Filed 1985·Granted Dec 30, 1986·87 cites·32 claims
- 0489US6964517B2Temperature probe and insertion deviceWELKER ENG·Filed 2004·Granted Nov 15, 2005·37 cites·9 claims
- 0586US6259523B1Optical inspection insertion apparatus for pressurized vesselsWELKER ENG·Filed 2000·Granted Jul 10, 2001·28 cites·13 claims
- 0685US5307830AFlow distribution method and apparatus reducing downstream turbulenceWELKER ENG·Filed 1993·Granted May 3, 1994·50 cites·20 claims
- 0784US6827486B2Temperature probe and insertion deviceWELKER ENG·Filed 2002·Granted Dec 7, 2004·28 cites·13 claims
- 0883US4557151ASampler incorporating pressure balanced check valveWELKER ENG·Filed 1983·Granted Dec 10, 1985·41 cites·6 claims
- 0983US4525127AFluid pump mechanismWELKER ENG·Filed 1981·Granted Jun 25, 1985·42 cites·9 claims
- 1081US7194920B2Sensor probe and pipeline construction and methodWELKER ENG·Filed 2005·Granted Mar 27, 2007·12 cites·18 claims
- 1179US5730416AMethod and apparatus for quieting turbulence in a gas flow line valveWELKER ENG·Filed 1995·Granted Mar 24, 1998·32 cites·7 claims
- 1276US4387592AProbe insertion apparatusWELKER ENG·Filed 1981·Granted Jun 14, 1983·27 cites·9 claims
- 1374US6422737B1Liquid sample cylinder with integral mixing pumpWELKER ENG·Filed 2001·Granted Jul 23, 2002·19 cites·13 claims
- 1474US4922764AConstant pressure sample cylinder with spheroid mixerWELKER ENG·Filed 1988·Granted May 8, 1990·31 cites·18 claims
- 1573US6818045B2Liquid separator with integral sight glassWELKER ENG·Filed 2002·Granted Nov 16, 2004·10 cites·30 claims
- 1673US6764536B2Sampling device with liquid eliminatorWELKER ENG·Filed 2002·Granted Jul 20, 2004·10 cites·18 claims
- 1773US5769388AFlow diffuser and valveWELKER ENG·Filed 1997·Granted Jun 23, 1998·31 cites·14 claims
- 1873US4628750AIntegrated pump and sample vesselWELKER ENG·Filed 1984·Granted Dec 16, 1986·26 cites·19 claims
- 1973US4459865AConstant pressure cylinder with vortex mixerWELKER ENG·Filed 1983·Granted Jul 17, 1984·27 cites·9 claims
- 2071US6439267B2Adjustable flow diffuserWELKER ENG·Filed 2001·Granted Aug 27, 2002·16 cites·21 claims
- 2170US6761757B2Instrument probe with valve and separatorWELKER ENG·Filed 2002·Granted Jul 13, 2004·15 cites·8 claims
- 2270US4928536AFluid sample apparatus featuring integral construction with a motor driven sampling systemWELKER ENG·Filed 1989·Granted May 29, 1990·27 cites·13 claims
- 2369US6092519AHeated sample container case and methodWELKER ENG·Filed 1999·Granted Jul 25, 2000·29 cites·6 claims
- 2468US6289934B1Flow diffuserWELKER ENG·Filed 1999·Granted Sep 18, 2001·26 cites·18 claims
- 2567US6250330B1Diaphragm regulator with removable diffuserWELKER ENG·Filed 1999·Granted Jun 26, 2001·25 cites·6 claims
- 2665US6085777ADual cylinder insertion apparatusWELKER ENG·Filed 1998·Granted Jul 11, 2000·28 cites·9 claims
- 2765US5213586AVent check valveWELKER ENG·Filed 1992·Granted May 25, 1993·25 cites·18 claims
- 2864US5579803AChromatograph protection deviceWELKER ENG·Filed 1995·Granted Dec 3, 1996·23 cites·14 claims
- 2961US5924673AMethod and apparatus for quieting turbulence in a gas flow line valveWELKER ENG·Filed 1998·Granted Jul 20, 1999·17 cites·11 claims
- 3060US4850669AExplosion-proof optical fiber connector for a light sourceWELKER ENG·Filed 1988·Granted Jul 25, 1989·20 cites·6 claims
- 3160US4403518ASampler apparatusWELKER ENG·Filed 1981·Granted Sep 13, 1983·17 cites·8 claims
- 3258US6091489AOptical inspection apparatus for pressurized vesselsWELKER ENG·Filed 1998·Granted Jul 18, 2000·18 cites·17 claims
- 3358US5945611ADual piston flow-through samplerWELKER ENG·Filed 1998·Granted Aug 31, 1999·19 cites·31 claims
- 3457US5907107AHeated instrument regulator tipWELKER ENG·Filed 1997·Granted May 25, 1999·19 cites·11 claims
- 3551US4463599AFree water volume analyzerWELKER ENG·Filed 1983·Granted Aug 7, 1984·17 cites·10 claims
- 3650US5578770AApparatus and method for gas detectionWELKER ENG·Filed 1995·Granted Nov 26, 1996·14 cites·19 claims
- 3750US5303599AMiniaturized samplerWELKER ENG·Filed 1992·Granted Apr 19, 1994·15 cites·9 claims
- 3850US4403519ASample collection apparatusWELKER ENG·Filed 1981·Granted Sep 13, 1983·14 cites·5 claims
- 3949US4440032ASampler incorporating a purge systemWELKER ENG·Filed 1982·Granted Apr 3, 1984·16 cites·7 claims
- 4048US5406855ASolenoid actuated samplerWELKER ENG·Filed 1994·Granted Apr 18, 1995·13 cites·8 claims
- 4147USRE35824EFluid sample apparatus featuring integral construction with a motor driven sampling systemWELKER ENG·Filed 1995·Granted Jun 16, 1998·12 cites·4 claims
- 4247US4942772AStack sampling systemWELKER ENG·Filed 1989·Granted Jul 24, 1990·14 cites·12 claims
- 4347US4777567AOptical inspection apparatusWELKER ENG·Filed 1986·Granted Oct 11, 1988·12 cites·11 claims
- 4447US4463603AVolume analyzer for crude oil sampling system including bite checking apparatusWELKER ENG·Filed 1983·Granted Aug 7, 1984·10 cites·11 claims
- 4543US5756906AStabilized insertion deviceWELKER ENG·Filed 1997·Granted May 26, 1998·11 cites·13 claims
- 4640US4882939APurge valveWELKER ENG·Filed 1988·Granted Nov 28, 1989·7 cites·24 claims
- 4738US4678290AApparatus for visual inspection of closed machineryWELKER ENG·Filed 1985·Granted Jul 7, 1987·7 cites·17 claims
- 4837US5996425AVanishing head sample cylinderWELKER ENG·Filed 1997·Granted Dec 7, 1999·5 cites·11 claims
- 4936US4908567APower supply system for an optical inspection apparatusWELKER ENG·Filed 1989·Granted Mar 13, 1990·6 cites·2 claims
- 5035US4395016AAxial flow regulator improvements including restrictorWELKER ENG·Filed 1981·Granted Jul 26, 1983·5 cites·4 claims
Showing the top 50 of 55 patent records by PatentIndex Score.
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