Inventor · disambiguated record
David J. Pech
Also filed as: PECH DAVID · PECH DAVID J
53 granted patents·3 pending applications·1,046 citations·filing 1974–2023
99Inventor score
Files withMANITOWOC CO23MANITOWOC CRANE COMPANIES LLC8PECH DAVID J7MANITOWOC CRANE CO INC5MANITOWOC CRANES LLC5
Top patents by PatentIndex Score
56 records- 0197US7967158B2Mobile lift crane with variable position counterweightMANITOWOC CRANE COMPANIES LLC·Filed 2008·Granted Jun 28, 2011·30 cites·24 claims
- 0296US7546928B2Mobile lift crane with variable position counterweightMANITOWOC CRANE CO INC·Filed 2007·Granted Jun 16, 2009·39 cites·31 claims
- 0396US4729486ALift enhancing beam attachment with movable counterweightsMANITOWOC CO·Filed 1986·Granted Mar 8, 1988·102 cites·10 claims
- 0495US4081081ADemountable gantry, boom hoist and counterweightMANITOWOC CO·Filed 1976·Granted Mar 28, 1978·69 cites·6 claims
- 0594US9278834B2Lift crane with moveable counterweightPECH DAVID J·Filed 2010·Granted Mar 8, 2016·18 cites·17 claims
- 0692US5199586AQuick-connect sectional boom members for cranes and the likeMANITOWOC CO·Filed 1991·Granted Apr 6, 1993·60 cites·35 claims
- 0792US4000784ADemountable self-propelled crane transport assemblyMANITOWOC CO·Filed 1975·Granted Jan 4, 1977·55 cites·7 claims
- 0891US11208303B2Lift crane with improved movable counterweightMANITOWOC CRANE COMPANIES LLC·Filed 2020·Granted Dec 28, 2021·3 cites·18 claims
- 0990US8075069B2Drive tumbler and track drive for mobile vehicles, including lift cranesPECH DAVID J·Filed 2009·Granted Dec 13, 2011·23 cites·24 claims
- 1090US6588521B1Four track crawler craneMANITOWOC CRANE CO INC·Filed 1999·Granted Jul 8, 2003·50 cites·20 claims
- 1189US10179722B2Lift crane with improved movable counterweightMANITOWOC CRANE COMPANIES LLC·Filed 2015·Granted Jan 15, 2019·7 cites·23 claims
- 1289US9051159B2Column connector systemMANITOWOC CRANE COMPANIES LLC·Filed 2013·Granted Jun 9, 2015·11 cites·20 claims
- 1388US12187587B2Mobile lift crane with variable position counterweightGROVE US LLC·Filed 2023·Granted Jan 7, 2025·0 cites·20 claims
- 1488US6481202B1Hydraulic system for boom hoist cylinder craneMANITOWOC CRANE CO INC·Filed 1998·Granted Nov 19, 2002·40 cites·19 claims
- 1585US10336589B2Mobile lift crane with variable position counterweightMANITOWOC CRANES LLC·Filed 2015·Granted Jul 2, 2019·3 cites·5 claims
- 1685US5579931ALiftcrane with synchronous rope operationMANITOWOC ENG CO·Filed 1994·Granted Dec 3, 1996·43 cites·12 claims
- 1785US5176267AQuick disconnect system for construction equipment with rotatable upper worksMANITOWOC CO·Filed 1990·Granted Jan 5, 1993·39 cites·16 claims
- 1884US10647555B2Lift crane with improved movable counterweightMANITOWOC CRANE COMPANIES LLC·Filed 2018·Granted May 12, 2020·3 cites·20 claims
- 1984US8684197B2Crane with boom raising assist structurePECH DAVID J·Filed 2010·Granted Apr 1, 2014·9 cites·25 claims
- 2083US4103783APlatform crane with counterweight and boom carrier support linkagesMANITOWOC CO·Filed 1977·Granted Aug 1, 1978·31 cites·2 claims
- 2183US3977530ACrane with gantry backhitch and boom hoist assembly removable as a unitMANITOWOC CO·Filed 1974·Granted Aug 31, 1976·35 cites·3 claims
- 2282US11261064B2Lift crane with moveable counterweightMANITOWOC CRANES LLC·Filed 2019·Granted Mar 1, 2022·2 cites·15 claims
- 2382US10865079B2Mobile lift crane with variable position counterweightMANITOWOC CRANE COMPANIES LLC·Filed 2019·Granted Dec 15, 2020·1 cites·11 claims
- 2480US11884522B2Mobile lift crane with variable position counterweightGROVE US LLC·Filed 2021·Granted Jan 30, 2024·0 cites·20 claims
- 2580US6062405AHydraulic boom hoist cylinder craneMANITOWOC CRANE GROUP INC·Filed 1997·Granted May 16, 2000·34 cites·17 claims
- 2679US8348073B2Carbody connection system and crane using sameMANITOWOC CRANE COMPANIES LLC·Filed 2009·Granted Jan 8, 2013·10 cites·27 claims
- 2777US6131751ACounter weight handling system and boom parking deviceMANITOWOC CRANE GROUP INC·Filed 1997·Granted Oct 17, 2000·27 cites·18 claims
- 2875US4042115ARotary counterweight crane with a removal track sectionMANITOWOC CO·Filed 1976·Granted Aug 16, 1977·23 cites·7 claims
- 2974US8511489B2Mobile lift crane with variable position counterweightPECH DAVID·Filed 2011·Granted Aug 20, 2013·3 cites·24 claims
- 3074US5522515ARing segment connectionMANITOWOC CO·Filed 1995·Granted Jun 4, 1996·31 cites·21 claims
- 3174US2022119232A1Lift crane with moveable counterweightMANITOWOC CRANES LLC·Filed 2021·Application pending·0 cites
- 3273US2021053802A1Mobile Lift Crane with Variable Position CounterweightMANITOWOC CRANES LLC·Filed 2020·Application pending·0 cites
- 3372US9132999B2Method of connecting crane suspension assembly sections together and frame mounted assembly used thereforePECH DAVID J·Filed 2012·Granted Sep 15, 2015·4 cites·24 claims
- 3469US6010018ASwing lock mechanismMANITOWOC CRANE GROUP INC·Filed 1997·Granted Jan 4, 2000·23 cites·39 claims
- 3569US5406767ALongitudinally divisible crane boom segmentMANITOWOC CO·Filed 1992·Granted Apr 18, 1995·24 cites·28 claims
- 3668US4013174ASwing drive with automatic shut-down controlMANITOWOC CO·Filed 1975·Granted Mar 22, 1977·19 cites·5 claims
- 3767US5615784ACrane counterweight installation and removal apparatusMANITOWOC CO·Filed 1994·Granted Apr 1, 1997·27 cites·15 claims
- 3866US7766176B2Mobile lift crane with lift enhancing attachmentMANITOWOC CRANE COMPANIES LLC·Filed 2008·Granted Aug 3, 2010·4 cites·16 claims
- 3966US5189605AControl and hydraulic system for a liftcraneMANITOWOC CO·Filed 1989·Granted Feb 23, 1993·18 cites·20 claims
- 4064US5487479AMethod for nesting longitudinally divisible crane boom segmentsMANITOWOC CO·Filed 1993·Granted Jan 30, 1996·21 cites·14 claims
- 4162US8414091B2Track tensioning system for mobile vehicles, including lift cranesPECH DAVID J·Filed 2009·Granted Apr 9, 2013·4 cites·20 claims
- 4260US4136855AHoist drum drive controlMANITOWOC CO·Filed 1976·Granted Jan 30, 1979·15 cites·3 claims
- 4360US4050586AApparatus for raising & lowering a mast and boom on a mobile craneMANITOWOC CO·Filed 1975·Granted Sep 27, 1977·15 cites·7 claims
- 4457US8985353B2Mobile lift crane with variable position counterweightPECH DAVID J·Filed 2013·Granted Mar 24, 2015·0 cites·24 claims
- 4555US8827092B2Mobile lift crane with variable position counterweightPECH DAVID J·Filed 2013·Granted Sep 9, 2014·0 cites·24 claims
- 4653US4069884ASelf-propelled drive mechanismMANITOWOC CO·Filed 1976·Granted Jan 24, 1978·11 cites·5 claims
- 4752US3949881ASwing drive assemblyMANITOWOC CO·Filed 1974·Granted Apr 13, 1976·10 cites·15 claims
- 4850US10457530B2Lift crane with moveable counterweightMANITOWOC CRANES LLC·Filed 2012·Granted Oct 29, 2019·0 cites·18 claims
- 4950US4005780ABoom stop and back hitch compensating systemMANITOWOC CO·Filed 1975·Granted Feb 1, 1977·9 cites·10 claims
- 5048US3988008APower lowering systemMANITOWOC CO·Filed 1975·Granted Oct 26, 1976·8 cites·12 claims
Showing the top 50 of 56 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →