David Rowntree has been granted 14 US patents while listed as an inventor at Black & Decker . The first was granted in 2008 and the most recent in October 2018. David Rowntree ranks #332,869 of 4,157,543 US inventors in our database (top 8.0%). Patent records list David Rowntree in Durham, GB.
Patents per Year Patents granted per year, 2008 to 2018 Bar chart with a peak of 3 patents in 2011. peak 3 2008: 1 patents 2008 2009: 1 patents 2009 2011: 3 patents 2011 2012: 3 patents 2012 2014: 1 patents 2014 2015: 1 patents 2015 2017: 1 patents 2017 2018: 3 patents 2018
Issued Patents All Time
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Showing 1–14 of 14 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
10092147 Vacuum cleaning device — 2018-10-09
9962046 Vacuum cleaning appliance — 2018-05-08
9861241 Vacuum cleaning device — 2018-01-09
9717390 Steam cleaning apparatus Barry Pears , Martyn Riley , Stephen Houghton , Andrew Walker 2017-08-01
9039844 Steam cleaning apparatus Barry Pears , Martyn Riley , Stephen Houghton , Andrew Walker 2015-05-26
8918952 Vacuum cleaner — 2014-12-30
RE43804 Hand-holdable vacuum cleaners Andrew Walker , Eric Coburn 2012-11-20
8123916 Apparatus for generating gas by electrolysis of a liquid Craig Stuart Blenkiron , Keith James Blundy 2012-02-28
8101877 Rotating dual switching mechanism — 2012-01-24
RE42873 Hand-holdable vacuum cleaners Andrew Walker , Eric Coburn 2011-11-01
8032984 Vacuum cleaner filter cleaning mechanisms Barry Pears 2011-10-11
8028373 Vacuum cleaners — 2011-10-04
7638021 Apparatus for generating gas by electrolysis of a liquid Craig Stuart Blenkiron , Keith James Blundy 2009-12-29
7370387 Hand-holdable vacuum cleaners Andrew Walker , Eric Coburn 2008-05-13
$6,309,000