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USPTO Patent Rankings Data through Dec 31, 2025
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David L. Walker — 110 Patents

ZPZenith Products: 88 patents #1 of 42Top 3%
BCBridgestone Sports Co.: 3 patents #96 of 224Top 45%
UCUniroyal Chemical Company: 2 patents #91 of 230Top 40%
ZEZenith Electronics: 2 patents #142 of 411Top 35%
ULUniroyal Chemical Ltd./Ltee: 2 patents #12 of 34Top 40%
SCSun-Maid Growers Of California: 2 patents #2 of 14Top 15%
ZRZenith Radio: 1 patents #81 of 184Top 45%
Portland, OR: #105 of 9,213 inventorsTop 2%
Oregon: #180 of 28,073 inventorsTop 1%
Overall (All Time): #11,945 of 4,157,543Top 1%
110 Patents All Time
David L. Walker has been granted 110 US patents while listed as an inventor at Zenith Products. The first was granted in 1985 and the most recent in December 2025. David L. Walker ranks #11,945 of 4,157,543 US inventors in our database (top 0.29%). Patent records list David L. Walker in Portland, OR, US.

Issued Patents All Time

Showing 1–25 of 110 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12513434 Read-out integrated circuit (ROIC) interface system for digitization and control (RIS-DC) Mohammad Vakil, Marc Hoffman, Dennis Daniels 2025-12-30
D914427 Bun toaster Debra J. Walker 2021-03-30
10865468 Methods of forming an oxide layer on a metal body — 2020-12-15
9404173 Methods of preparing a surface of a cast zirconium alloy substrate for oxidation — 2016-08-02
D714571 Shower caddy — 2014-10-07
D693209 Pair of shower rod end caps Kaveh Didehvar 2013-11-12
D681423 Pair of shower rod end caps Kaveh Didehvar 2013-05-07
D672178 Wall-mountable towel bar — 2012-12-11
D666012 End cap for a support rod Kaveh Didehvar 2012-08-28
8124187 Methods of forming porous coatings on substrates Cheyenne Xiaoyan Su 2012-02-28
D652230 Cabinet Kevin Didehvar, Nina Barnett, Joseph Vaccaro 2012-01-17
D652236 Spacesaver bottom assembly — 2012-01-17
D652233 Cabinet Kevin Didehvar, Nina Barnett, Joseph Vaccaro 2012-01-17
D652232 Cabinet Kevin Didehvar, Nina Barnett, Joseph Vaccaro 2012-01-17
D652231 Cabinet Kevin Didehvar, Nina Barnett, Joseph Vaccaro 2012-01-17
D648152 Cabinet Kevin Didehvar, Nina Barnett, Joseph Vaccaro 2011-11-08
D648151 Cabinet Kevin Didehvar, Nina Barnett, Joseph Vaccaro 2011-11-08
D641191 Shower caddy — 2011-07-12
7883662 Metal injection molding methods and feedstocks Larry E. LaVoie, James C. Moore 2011-02-08
D609953 Concave mirrored swing door medicine cabinet — 2010-02-16
D609952 Concave wood framed swing door medicine cabinet — 2010-02-16
D609951 Oval swing door medicine cabinet — 2010-02-16
D594674 Two door fabritec vanity — 2009-06-23
D589129 One door fabritec vanity — 2009-03-24
D573387 Pole caddy — 2008-07-22

Nearby-Ranked Inventors

Thomas Marshall Congdon110
Hiroyuki Arai110
Kunio Watanabe110
William J. Drasler110
Ben Huang110
Shinya Takahashi110
Hiroyuki Nagashima110
Bart M.A. Missotten110
G. R. Mohan Rao110