Inventor · disambiguated record
Douglass E. Hughes
Also filed as: HUGHES DOUGLASS · HUGHES DOUGLASS E
14 granted patents·1 pending application·1,141 citations·filing 1993–2006
95Inventor score
Top patents by PatentIndex Score
15 records- 0198US6523711B1Automatic valved bottle cap for use with liquid containersHUGHES DOUGLASS E·Filed 2000·Granted Feb 25, 2003·237 cites·13 claims
- 0297US6395170B1Universal filter for soda pop and bottled water bottlesFiled 2000·Granted May 28, 2002·124 cites·44 claims
- 0396US6524477B1Gravity-flow filtration cartridge for the removal of microorganisms and/or other contaminantsRICH BUHLER·Filed 1998·Granted Feb 25, 2003·193 cites·23 claims
- 0495USD448971SDrinking container closureFiled 2000·Granted Oct 9, 2001·69 cites·1 claims
- 0594USD448448SFilter housingFiled 1999·Granted Sep 25, 2001·56 cites·1 claims
- 0692US6468435B1Automatic valved filter assemblyHUGHES DOUGLASS E·Filed 2000·Granted Oct 22, 2002·51 cites·32 claims
- 0791US5840185ASports bottle filter cartridgeHUGHES DOUGLASS E·Filed 1996·Granted Nov 24, 1998·101 cites·20 claims
- 0890US7112272B2Liquid and gas porous plastic filter and methods of use3M INNOVATIVE PROPERTIES CO·Filed 2002·Granted Sep 26, 2006·53 cites·25 claims
- 0990US7112280B2Gas porous polymer filter and methods of use3M INNOVATIVE PROPERTIES CO·Filed 2002·Granted Sep 26, 2006·64 cites·32 claims
- 1088US6267887B1Shower filter for chlorine removal and scale deposit preventionFiled 2000·Granted Jul 31, 2001·45 cites·14 claims
- 1185US6096197AShower filter for chlorine removal and scale deposit preventionFiled 1997·Granted Aug 1, 2000·54 cites·17 claims
- 1284US7374680B2Filtration matrix3M INNOVATIVE PROPERTIES CO·Filed 2006·Granted May 20, 2008·12 cites·19 claims
- 1382US7169304B2Porous polymer water filter and methods of use in refrigeration3M INNOVATIVE PROPERTIES CO·Filed 2002·Granted Jan 30, 2007·33 cites·9 claims
- 1481US5407573AContinuous flow water-purifying deviceALPINE WATER PURIFICATION INC·Filed 1993·Granted Apr 18, 1995·49 cites·8 claims
- 1544US2002036176A1Universal filter for soda pop and bottled water bottlesFiled 2001·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →