Inventor · disambiguated record
David L. Simpson
Also filed as: SIMPSON DAVID L · SIMPSON DAVID LEE
29 granted patents·4 pending applications·297 citations·filing 1974–2023
97Inventor score
Files withU HAUL INT INC25MOTIVE DRILLING TECH INC4DOLAN ROBERT A1ILLINOIS TOOL WORKS1SIMPSON DAVID L1
Top patents by PatentIndex Score
33 records- 0198US10208580B2System and method for detection of slide and rotation modesMOTIVE DRILLING TECH INC·Filed 2016·Granted Feb 19, 2019·27 cites·22 claims
- 0298US7686385B2Flexible truck skirt with floating mountU HAUL INT INC·Filed 2006·Granted Mar 30, 2010·74 cites·18 claims
- 0397US11047222B2System and method for detecting a mode of drillingMOTIVE DRILLING TECH INC·Filed 2019·Granted Jun 29, 2021·10 cites·21 claims
- 0496US11828156B2System and method for detecting a mode of drillingMOTIVE DRILLING TECH INC·Filed 2021·Granted Nov 28, 2023·3 cites·19 claims
- 0583US6994393B2TrailerU HAUL INT INC·Filed 2003·Granted Feb 7, 2006·21 cites·6 claims
- 0683US2024044240A1System and method for detecting a mode of drillingMOTIVE DRILLING TECH INC·Filed 2023·Application pending·0 cites
- 0774USD478495SHingeU HAUL INT INC·Filed 2001·Granted Aug 19, 2003·19 cites·1 claims
- 0872USD469681SLatch leverU HAUL INT INC·Filed 2001·Granted Feb 4, 2003·18 cites·1 claims
- 0971US6634701B2TrailerU HAUL INT INC·Filed 2003·Granted Oct 21, 2003·11 cites·12 claims
- 1070US3942254ATrue index gear tooth space checking machineILLINOIS TOOL WORKS·Filed 1974·Granted Mar 9, 1976·17 cites·2 claims
- 1168USD458285SBushingU HAUL INT INC·Filed 2001·Granted Jun 4, 2002·15 cites·1 claims
- 1263US6575523B2TrailerU HAUL INT INC·Filed 2001·Granted Jun 10, 2003·8 cites·50 claims
- 1362US6631941B1TrailerU HAUL INT INC·Filed 2003·Granted Oct 14, 2003·7 cites·2 claims
- 1460US6722727B2TrailerU HAUL INT INC·Filed 2003·Granted Apr 20, 2004·6 cites·9 claims
- 1558US6749248B1Trailer coverU HAUL INT INC·Filed 2003·Granted Jun 15, 2004·5 cites·9 claims
- 1656US6601908B2TrailerU HAUL INT INC·Filed 2003·Granted Aug 5, 2003·5 cites·7 claims
- 1756USD469336SKeeperU HAUL INT INC·Filed 2001·Granted Jan 28, 2003·9 cites·1 claims
- 1852US7360801B2Door latching systemU HAUL INT INC·Filed 2001·Granted Apr 22, 2008·4 cites·19 claims
- 1951USD468993SHookU HAUL INT INC·Filed 2001·Granted Jan 21, 2003·7 cites·1 claims
- 2051USD466391SHandleU HAUL INT INC·Filed 2001·Granted Dec 3, 2002·7 cites·1 claims
- 2150US2008092345A1Security Hook with Blocking MemberDOLAN ROBERT A·Filed 2007·Application pending·0 cites
- 2248USD578944SSide skirt for a truckU HAUL INT INC·Filed 2006·Granted Oct 21, 2008·5 cites·1 claims
- 2348US6695391B1TrailerU HAUL INT INC·Filed 2003·Granted Feb 24, 2004·2 cites·8 claims
- 2445USD468994SLatch baseU HAUL INT INC·Filed 2001·Granted Jan 21, 2003·5 cites·1 claims
- 2545USD468992SLatch housingU HAUL INT INC·Filed 2001·Granted Jan 21, 2003·5 cites·1 claims
- 2643US10252376B2Welded lap joint with corrosive-protective structureSIMPSON DAVID L·Filed 2009·Granted Apr 9, 2019·0 cites·14 claims
- 2742USD469683SProp rodU HAUL INT INC·Filed 2001·Granted Feb 4, 2003·4 cites·1 claims
- 2842US2005150088A1In-line security hookU HAUL INT INC·Filed 2004·Application pending·0 cites
- 2937USD589861SSide skirt for a truckU HAUL INT INC·Filed 2008·Granted Apr 7, 2009·2 cites·1 claims
- 3036US2002181956A1Forms and materials for accident recordationFiled 2001·Application pending·0 cites
- 3133USD469334SBeakU HAUL INT INC·Filed 2001·Granted Jan 28, 2003·1 cites·1 claims
- 3230USD470744SRotator clevisU HAUL INT INC·Filed 2001·Granted Feb 25, 2003·0 cites·1 claims
- 3330USD469335SStrikerU HAUL INT INC·Filed 2001·Granted Jan 28, 2003·0 cites·1 claims
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