Inventor · disambiguated record
David L. Hughes
Also filed as: HUGHES DAVID L · HUGHES JR DAVID L · HUGHES JR DAVID LATIMORE
29 granted patents·14 pending applications·269 citations·filing 1985–2024
96Inventor score
Files withMUELLER INT LLC16MERCK & CO INC13ELLISON EDUCATIONAL EQUIP INC12HUGHES DAVID L1PROVO CRAFT & NOVELTY INC1
Top patents by PatentIndex Score
43 records- 0195US6619195B2Die press with integral cover and guides and improved die feed systemELLISON EDUCATIONAL EQUIP INC·Filed 2002·Granted Sep 16, 2003·34 cites·31 claims
- 0292US6626965B2Apparatus for forming die cuts and method of manufacturing samePROVO CRAFT & NOVELTY INC·Filed 2001·Granted Sep 30, 2003·53 cites·38 claims
- 0385US11478910B2Pipe coupon extraction toolMUELLER INT LLC·Filed 2020·Granted Oct 25, 2022·2 cites·19 claims
- 0485US4894450AProcess for 2-(aminoalkylthio) carbapenemsMERCK & CO INC·Filed 1987·Granted Jan 16, 1990·20 cites·3 claims
- 0579US11549628B1Insert valve cut warning systemMUELLER INT LLC·Filed 2021·Granted Jan 10, 2023·1 cites·20 claims
- 0676US5552521AProcess for preparing certain aza cyclohexapeptidesMERCK & CO INC·Filed 1995·Granted Sep 3, 1996·46 cites·15 claims
- 0775US11945038B2Pipe coupon retainerMUELLER INT LLC·Filed 2021·Granted Apr 2, 2024·0 cites·10 claims
- 0874US2024189925A1Pipe coupon retainerMUELLER INT LLC·Filed 2024·Application pending·0 cites
- 0974US2024189926A1Method of using a pipe coupon retainerMUELLER INT LLC·Filed 2024·Application pending·0 cites
- 1073US11951599B2Pipe coupon extraction toolMUELLER INT LLC·Filed 2022·Granted Apr 9, 2024·0 cites·20 claims
- 1170US6262268B1Process and intermediates to a tetrahydro-[1,8]-naphthyridineMERCK & CO INC·Filed 2000·Granted Jul 17, 2001·4 cites·30 claims
- 1269US11913584B2Insert valve cut warning systemMUELLER INT LLC·Filed 2022·Granted Feb 27, 2024·0 cites·20 claims
- 1368US5665882APyridyl ethylation of lactamsMERCK & CO INC·Filed 1994·Granted Sep 9, 1997·10 cites·10 claims
- 1466USD472564SDie pressELLISON EDUCATIONAL EQUIP INC·Filed 2002·Granted Apr 1, 2003·15 cites·1 claims
- 1566US5312923AProcess for preparing fibrinogen receptor antagonistsMERCK & CO INC·Filed 1993·Granted May 17, 1994·9 cites·3 claims
- 1664US7066083B2Die press with integral cover and guides and improved die feed systemELLISON EDUCATIONAL EQUIP INC·Filed 2003·Granted Jun 27, 2006·3 cites·59 claims
- 1764US6333435B1Process of synthesizing binaphthyl derivativesMERCK & CO INC·Filed 1995·Granted Dec 25, 2001·12 cites·6 claims
- 1864US2025033126A1Retractable drill bitMUELLER INT LLC·Filed 2023·Application pending·0 cites
- 1963US12492684B1Solid-state energy harvesterMUELLER INT LLC·Filed 2024·Granted Dec 9, 2025·0 cites·19 claims
- 2063US6994024B2Embossing system to be used with a die pressELLISON EDUCATIONAL EQUIP INC·Filed 2003·Granted Feb 7, 2006·8 cites·23 claims
- 2163US6945166B2Die press with dual camELLISON EDUCATIONAL EQUIP INC·Filed 2002·Granted Sep 20, 2005·10 cites·27 claims
- 2261US7434508B2Die press with dual camELLISON EDUCATIONAL EQUIP INC·Filed 2005·Granted Oct 14, 2008·3 cites·6 claims
- 2360US2025303526A1ClampMUELLER INT LLC·Filed 2024·Application pending·0 cites
- 2459US5206373AProcess for preparing fibrinogen receptor antagonistsMERCK & CO INC·Filed 1992·Granted Apr 27, 1993·6 cites·4 claims
- 2558USD468187SGrip for a die pressELLISON EDUCATIONAL EQUIP INC·Filed 2002·Granted Jan 7, 2003·11 cites·1 claims
- 2656US2025327544A1Pressurizing gasketMUELLER INT LLC·Filed 2024·Application pending·0 cites
- 2754US2024075539A1Shell cutter depth stopMUELLER INT LLC·Filed 2022·Application pending·0 cites
- 2854US2025305589A1Low water hammer break check valveMUELLER INT LLC·Filed 2024·Application pending·0 cites
- 2953US2025215987A1Insertion valveMUELLER INT LLC·Filed 2024·Application pending·0 cites
- 3053US2007051204A1Method of making a thin die to be used in a pressELLISON EDUCATIONAL EQUIP INC·Filed 2006·Application pending·0 cites
- 3151US5340927AProcess for the preparation of 2-diazo-3-trisubstituted silyloxy 3-butenoatesMERCK & CO INC·Filed 1992·Granted Aug 23, 1994·5 cites·7 claims
- 3251US2024230004A1Integral flexure tapping sleeveMUELLER INT LLC·Filed 2023·Application pending·0 cites
- 3347USD685049SGolf tee and pick holderHUGHES DAVID L·Filed 2012·Granted Jun 25, 2013·7 cites·1 claims
- 3447US5157122AProcess for the preparation of 3-unsubstituted indoles using methane sulfonic acid as an additional catalystMERCK & CO INC·Filed 1991·Granted Oct 20, 1992·3 cites·16 claims
- 3547US2005028644A1Method of making a thin die to be used in a pressELLISON EDUCATIONAL EQUIP INC·Filed 2004·Application pending·0 cites
- 3647US2005050936A1Thin die to be used in a pressELLISON EDUCATIONAL EQUIP INC·Filed 2004·Application pending·0 cites
- 3744US5126456A7-chloroquinaldine synthesisMERCK & CO INC·Filed 1991·Granted Jun 30, 1992·2 cites·6 claims
- 3842US2007186748A1Interchangeable Die Press System and MethodELLISON EDUCATIONAL EQUIP INC·Filed 2007·Application pending·0 cites
- 3936USD1104221SFluted valve bonnetMUELLER INT LLC·Filed 2023·Granted Dec 2, 2025·0 cites·1 claims
- 4036US5892082AProcess for the preparation of dimethyl titanoceneMERCK & CO INC·Filed 1997·Granted Apr 6, 1999·4 cites·22 claims
- 4136US4654433AProcess for the preparation of esters of amino acidsMERCK & CO INC·Filed 1985·Granted Mar 31, 1987·1 cites·15 claims
- 4236US2004112196A1Interchangeable die press system and methodELLISON EDUCATIONAL EQUIP INC·Filed 2003·Application pending·0 cites
- 4329US5070022AEnzymic process for preparing leukotriene antagonistsMERCK & CO INC·Filed 1988·Granted Dec 3, 1991·0 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →