David G. Duckworth

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Newport Beach, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Centralizers for centralizing well casings
- Patent number 9,725,967
- Issue date Aug 8, 2017
- BP Corporation North America Inc.
- Scott E. Jewett
- E21 - EARTH DRILLING MINING
Information Patent Grant
Centralizers for centralizing well casings
- Patent number 9,626,091
- Issue date Apr 18, 2017
- BP Corporation North America Inc.
- Scott E. Jewett
- E21 - EARTH DRILLING MINING
Information Patent Grant
Illuminated keyboard
- Patent number 8,890,720
- Issue date Nov 18, 2014
- Michael Shipman
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Cavity filled lightpipe for illuminating keys of a keyboard
- Patent number 8,690,368
- Issue date Apr 8, 2014
- Michael Shipman
- G01 - MEASURING TESTING
Information Patent Grant
Illuminated keyboard
- Patent number 7,172,303
- Issue date Feb 6, 2007
- Michael Shipman
- G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents

Information Patent Application
Centralizers For Centralizing Well Casings
- Publication number 20160084021
- Publication date Mar 24, 2016
- BP CORPORATION NORTH AMERICA INC.
- Scott E. Jewett
- E21 - EARTH DRILLING MINING
Information Patent Application
CENTRALIZERS FOR CENTRALIZING WELL CASINGS
- Publication number 20150027684
- Publication date Jan 29, 2015
- PORTABLE COMPOSITE STRUCTURES, INC.
- SCOTT E. JEWETT
- E21 - EARTH DRILLING MINING
Information Patent Application
Illuminated keyboard
- Publication number 20120139843
- Publication date Jun 7, 2012
- Michael Shipman
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Illuminated keyboard
- Publication number 20090201179
- Publication date Aug 13, 2009
- Michael Shipman
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Illuminated keyboard
- Publication number 20050083672
- Publication date Apr 21, 2005
- Michael Shipman
- G06 - COMPUTING CALCULATING COUNTING