Douglas Marshall has been granted 12 US patents while listed as an inventor at AT&T . The first was granted in 2000 and the most recent in October 2019. Douglas Marshall ranks #396,045 of 4,157,543 US inventors in our database (top 9.5%). Patent records list Douglas Marshall in San Mateo, CA, US.
Patents per Year Patents granted per year, 2000 to 2019 Bar chart with a peak of 3 patents in 2011. peak 3 2000: 1 patents 2000 2001: 1 patents 2001 2003: 2 patents 2003 2007: 1 patents 2007 2008: 1 patents 2008 2009: 1 patents 2009 2011: 3 patents 2011 2012: 1 patents 2012 2019: 1 patents 2019
Issued Patents All Time
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Showing 1–12 of 12 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
D864228 Display screen with graphical user interface Kai Haas , Harsh Agrawal 2019-10-22
D663857 Car wash building — 2012-07-17
8036354 Calling-party-pays call processing for cellular and paging Carol Shifrin Gruchala , Gordon Lynn Blumenschein , Roger Albert Sosa , Carlos Donoso 2011-10-11
$18,571,000
7947326 Methods of forming a fluidized bed of circulating particles — 2011-05-24
7927680 Temporary facial decal — 2011-04-19
7559816 Flotation device — 2009-07-14
7366292 Call management reports Dianna Tiliks , Nancy Book , Susanne Marie Crockett , Carol Shifrin Gruchala , John Wesley Moss +6 more 2008-04-29
$51,191,000
7257209 Calling-party-pays call processing for cellular and paging Carol Shifrin Gruchala , Gordon Lynn Blumenschein , Roger Albert Sosa , Carlos Donoso 2007-08-14
$9,635,000
6602418 Solution dewatering with concomitant ion removal Eric S. Peterson , Mark L. Stone 2003-08-05
6570970 Calling-party-pays call processing for cellular and paging Carol Shifrin Gruchala , Gordon Lynn Blumenschein , Roger Albert Sosa , Carlos Donoso 2003-05-27
6263056 Calling-party-pays call processing for cellular and paging Carol Shifrin Gruchala , Gordon Lynn Blumenschein , Roger Albert Sosa , Carlos Donoso 2001-07-17
6109888 Electromagnetically driven peristaltic pump — 2000-08-29
