Inventor
MCDOWELL JAMES KERWIN
US27 patents
Patents
27 patentsUS9068584B2Jun 30, 2015
Apparatus and methods for connecting mats
NEWPARK MATS & INTEGRATED SERVICES LLC24 citations92
US9337586B2May 10, 2016
Apparatus and methods for electrically grounding a load-supporting surface
NEWPARK MATS & INTEGRATED SERVICES LLC22 citations91
US10513389B1Dec 24, 2019
Methods of preventing liquids from leaking off of a support surface
NEWPARK MATS & INTEGRATED SERVICES LLC4 citations84
US9745124B2Aug 29, 2017
Liquid containment system
NEWPARK MATS & INTEGRATED SERVICES LLC5 citations84
US9212746B2Dec 15, 2015
Apparatus and methods for sealing between adjacent components of a load-supporting surface
NEWPARK MATS & INTEGRATED SERVICES LLC16 citations84
US9039325B2May 26, 2015
Liquid containment system for use with load-supporting surfaces
NEWPARK MATS & INTEGRATED SERVICES LLC12 citations84
US10266994B2Apr 23, 2019
Apparatus and methods for connecting components of a support surface
NEWPARK MATS & INTEGRATED SERVICES LLC15 citations83
US11059666B2Jul 13, 2021
Large-capacity modular holding container and related methods
NEWPARK MATS & INTEGRATED SERVICES LLC11 citations82
US9985390B2May 29, 2018
Electrically groundable support surface and related methods
NEWPARK MATS & INTEGRATED SERVICES LLC9 citations82
US9735510B2Aug 15, 2017
Apparatus and methods for electrically grounding at least one mat in a load-supporting surface
NEWPARK MATS & INTEGRATED SERVICES LLC9 citations82
US9368918B2Jun 14, 2016
Apparatus and methods for electrically grounding a load-supporting surface
NEWPARK MATS & INTEGRATED SERVICES LLC11 citations82
US10024075B2Jul 17, 2018
Apparatus, system and methods for supporting one or more upright items from a support surface
NEWPARK MATS & INTEGRATED SERVICES LLC8 citations80
US9972942B1May 15, 2018
Apparatus and methods for insulating an electrically-groundable support surface
NEWPARK MATS & INTEGRATED SERVICES LLC12 citations79
US10124956B2Nov 13, 2018
Liquid containment system that accommodates vehicle ingress and egress
NEWPARK MATS & INTEGRATED SERVICES LLC2 citations73
US10355417B1Jul 16, 2019
Apparatus and methods for electrically coupling multiple electrically-conductive ground covers
NEWPARK MATS & INTEGRATED SERVICES LLC2 citations71
US10340637B1Jul 2, 2019
Electrically conductive support surface and related methods
NEWPARK MATS & INTEGRATED SERVICES LLC1 citations71
US9637871B2May 2, 2017
Load-supporting surface with actively connected gap seals and related apparatus and methods
NEWPARK MATS & INTEGRATED SERVICES LLC2 citations70
US9605392B2Mar 28, 2017
Load-supporting surface with redundant interfacing gap seal members and related methods
NEWPARK MATS & INTEGRATED SERVICES LLC2 citations70
US10639775B2May 5, 2020
Systems, apparatus and methods for manipulating a ground cover attachment pin
NEWPARK MATS & INTEGRATED SERVICES LLC2 citations69
US9430943B2Aug 30, 2016
Apparatus and methods for providing illuminated signals from a support surface
NEWPARK MATS & INTEGRATED SERVICES LLC3 citations69
US9790758B2Oct 17, 2017
Apparatus and methods for mechanically coupling a sealing system around the opening to cellar formed around a hydrocarbon exploration or production well
NEWPARK MATS & INTEGRATED SERVICES LLC2 citations68
US9404227B2Aug 2, 2016
Load-supporting surface with interfacing gap seal members and related apparatus and methods
NEWPARK MATS & INTEGRATED SERVICES LLC2 citations60
US12378731B2Aug 5, 2025
Overlapping modular mat system including mat components having fortifying members
NEWPARK MATS & INTEGRATED SERVICES LLC0 citations58
US12291826B2May 6, 2025
Overlapping modular mat system including mat components having fortifying members
NEWPARK MATS & INTEGRATED SERVICES LLC0 citations58
US9499946B2Nov 22, 2016
Method of sealing between adjacent components of a load-supporting surface with at least one closed-cell compressible rubber seal
NEWPARK MATS & INTEGRATED SERVICES LLC1 citations52
US9677229B2Jun 13, 2017
Methods of manufacturing load-supporting mats for use with interfacing gap seal members
NEWPARK MATS & INTEGRATED SERVICES LLC0 citations49
US9745815B2Aug 29, 2017
Apparatus and methods for sealing around the opening to a cellar formed around a hydrocarbon exploration or production well
NEWPARK MATS & INTEGRATED SERVICES LLC0 citations36