Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
DW

David Walker — 19 Patents

BSBj Services: 6 patents #25 of 250Top 10%
BUBj Services Company, U.S.A.: 3 patents #6 of 44Top 15%
OSOsca: 3 patents #1 of 16Top 7%
RTR.P. Scherer Technologies: 2 patents #82 of 176Top 50%
CUColumbia University: 1 patents #1,151 of 2,492Top 50%
Qualcomm: 1 patents #7,593 of 12,104Top 65%
Skokie, IL: #34 of 674 inventorsTop 6%
Illinois: #4,093 of 84,256 inventorsTop 5%
Overall (All Time): #229,345 of 4,157,543Top 6%
19 Patents All Time
David Walker has been granted 19 US patents while listed as an inventor at Bj Services. The first was granted in 1998 and the most recent in April 2025. David Walker ranks #229,345 of 4,157,543 US inventors in our database (top 5.5%). Patent records list David Walker in Skokie, IL, US.

Issued Patents All Time

Showing 1–19 of 19 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12263646 Devices, systems, and methods for multi-projector three dimensional printing Michael Flynn, Jay VALDILLEZ 2025-04-01
11472119 Devices, systems, and methods for multi-projector three dimensional printing Michael Flynn, Jay VALDILLEZ 2022-10-18
9524463 Methods and systems for automating carbon footprinting Christoph Johannes MEINRENKEN, Klaus S. Lackner, Robert Christian ter Kuile 2016-12-20
9219674 Packet detection in the presence of interferers Vinayak Chowdiah, Gregory Alan Breit 2015-12-22 $14,745,000
7543647 Multi-zone, single trip well completion system and methods of use 2009-06-09 $62,173,000
7490669 Multi-zone, single trip well completion system and methods of use Dewayne Turner, Gregg W. Stout, Todd Ulrich Chretien, Christopher L. Blackler, Jack Robbins +1 more 2009-02-17 $21,141,000
7472750 Single trip horizontal gravel pack and stimulation system and method Wade Rebardi, Marvin Bryce Traweek, Floyd Bishop 2009-01-06 $16,628,000
7331388 Horizontal single trip system with rotating jetting tool Alvaro Jose Vilela, Wade Rebardi, Marvin Bryce Traweek, Floyd Bishop 2008-02-19 $44,813,000
7210527 Single trip horizontal gravel pack and stimulation system and method Wade Rebardi, Marvin Bryce Traweek, Floyd Bishop 2007-05-01 $22,249,000
7150326 Bi-directional ball seat system and method Floyd Bishop, Marvin Bryce Traweek, Richard J. Ross, Dewayne Turner 2006-12-19 $37,410,000
7021389 Bi-directional ball seat system and method Floyd Bishop, Marvin Bryce Traweek, Richard J. Ross, Dewayne Turner 2006-04-04 $82,492,000
7017664 Single trip horizontal gravel pack and stimulation system and method Wade Rebardi, Marvin Bryce Traweek, Floyd Bishop 2006-03-28 $42,618,000
6884060 Apparatus for manufacturing encapsulated products Keith Tanner, Steve Burnett, Peter Beke, Norman S. Stroud, Mani Sundararajan 2005-04-26
6568474 Rigless one-trip perforation and gravel pack system and method Kevin R. George, Stanley Wall, Marvin Bryce Traweek, Barry Ed Smith, David Hebert 2003-05-27 $56,784,000
6405800 Method and apparatus for controlling fluid flow in a well Dewayne Turner, Marvin Bryce Traweek 2002-06-18 $2,705,000
6397949 Method and apparatus for production using a pressure actuated circulating valve Dewayne Turner, William David Henderson, Mike Ritter 2002-06-04 $7,174,000
6302208 Gravel pack isolation system William Mark Richards 2001-10-16
6206100 Separable one-trip perforation and gravel pack system and method Kevin R. George, Stanley Wall, Marvin Bryce Traweek, Barry Ed Smith, Stephen C. Yeary 2001-03-27 $2,364,000
5735105 Encapsulation apparatus and process Norman S. Stroud, Kelvin Royce Garnett, Arthur J. Burnett, Anthony Wood 1998-04-07 $8,649,000