Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Douglas James Wallace MacFarlane — 9 Patents

WMWolfson Microelectronics: 4 patents #13 of 51Top 30%
CLCirrus Logic: 3 patents #393 of 1,131Top 35%
CSCirrus Logic International Semiconductor: 2 patents #8 of 53Top 20%
Edinburgh, GB: #100 of 1,358 inventorsTop 8%
Overall (All Time): #535,341 of 4,157,543Top 15%
9 Patents All Time
Douglas James Wallace MacFarlane has been granted 9 US patents while listed as an inventor at Wolfson Microelectronics. The first was granted in 2012 and the most recent in January 2018. Douglas James Wallace MacFarlane ranks #535,341 of 4,157,543 US inventors in our database (top 12.9%). Patent records list Douglas James Wallace MacFarlane in Edinburgh, GB.

Patents per Year

Patents granted per year, 2012 to 2018Bar chart with a peak of 2 patents in 2013.peak 22012: 1 patents20122013: 2 patents20132014: 1 patents20142015: 1 patents20152016: 2 patents20162017: 1 patents20172018: 1 patents2018

Issued Patents All Time

Showing 1–9 of 9 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
9872103 Microphone biasing circuitry and method thereof Andrew J. HOWLETT, Graeme G. MACKAY 2018-01-16 $25,192,000
9661434 Microphone biasing circuitry and method thereof Andrew J. HOWLETT, Graeme G. MACKAY 2017-05-23 $19,266,000
9490765 Microphone biasing circuitry and method thereof Andrew J. HOWLETT, Graeme G. MACKAY 2016-11-08 $17,343,000
9300212 DC-DC converters operable in a discontinuous switching mode Andrew Notman, Mark McCloy-Stevens, Holger Haiplik 2016-03-29
9148722 Microphone biasing circuitry and method thereof Andrew J. HOWLETT, Graeme G. MACKAY 2015-09-29
8699726 Apparatus and method for biasing a transducer Colin Steele 2014-04-15
8541993 DC-DC converters operable in a discontinuous switching mode Andrew Notman, Mark McCloy-Stevens, Holger Haiplik 2013-09-24
8508288 Charge pump circuit and methods of operation thereof 2013-08-13
8264273 Charge pump circuit and methods of operation thereof 2012-09-11