Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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David Mumford — 17 Patents

WPWestport Power: 11 patents #3 of 146Top 3%
WRWestport Research: 2 patents #13 of 45Top 30%
WCWestport Fuel Systems Canada: 1 patents #8 of 23Top 35%
Caterpillar: 1 patents #4,457 of 8,398Top 55%
Vancouver, CA: #207 of 5,070 inventorsTop 5%
Overall (All Time): #263,971 of 4,157,543Top 7%
17 Patents All Time
David Mumford has been granted 17 US patents while listed as an inventor at Westport Power. The first was granted in 2004 and the most recent in October 2025. David Mumford ranks #263,971 of 4,157,543 US inventors in our database (top 6.3%). Patent records list David Mumford in Vancouver, BC, CA.

Patents per Year

Patents granted per year, 2004 to 2021Bar chart with a peak of 2 patents in 2006.peak 22004: 1 patents20042006: 2 patents2012: 1 patents20122013: 1 patents2015: 1 patents20152016: 2 patents2017: 1 patents20172018: 2 patents2019: 2 patents20192020: 2 patents2021: 1 patents2021

Issued Patents All Time

Showing 1–17 of 17 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12442337 Apparatus and method for regulating and injecting gaseous fuel into an internal combustion engine Sandeep Munshi, Jianbing Huang, Ashish Singh, Gage D. Garner 2025-10-14
11053866 Hydraulically actuated gaseous fuel injector Michael C. Wickstone 2021-07-06 $10,380,000
10865718 Pressure regulating modules with controlled leak paths 2020-12-15 $7,996,000
10527005 Apparatus for reducing pressure pulsations in a gaseous fuelled internal combustion engine Ashish Singh, Alain M. J. Touchette, Guowei Li, Michael C. Wickstone, Christopher J. B. Dicken 2020-01-07 $3,028,000
10371065 High pressure fluid control system and method of controlling pressure bias in an end use device Derek Puzzuoli, Jordan C. Haas, Wesley A. Brown, Victor Woo, Joshua W. Steffen 2019-08-06 $3,577,000
10247112 Hydraulically actuated gaseous fuel injector Michael C. Wickstone 2019-04-02 $3,728,000
10030613 Supplying gaseous fuel from a liquid state to an engine Bradley E. Melanson, Paul M. Blomerus, Melissa S.A. McKinnon 2018-07-24 $5,245,000
9863365 Supplying gaseous fuel from a liquid state to an internal combustion engine Bradley E. Melanson, Paul M. Blomerus, Melissa S.A. McKinnon 2018-01-09 $9,211,000
9556805 Control system and method for isolating high pressure pilot fuel in dual-fuel HPDI system Josh Steffen, Derek Puzzuoli 2017-01-31 $14,857,000
9458805 Method and apparatus for pumping fuel to a fuel injection system Jordan C. Haas, Timothy N. Lennox, B. Keir Pritchard, Mark Tsui 2016-10-04
9366195 Fuel injection valve and method of actuating David R. Wager, Gordon P. McTaggart-Cowan, Sandeep Munshi 2016-06-14 $2,359,000
9022303 Fuel injection valve and method for co-injecting a liquid and a gaseous fuel into the combustion chamber of an internal combustion engine Sandeep Munshi 2015-05-05 $5,640,000
8413638 Directly actuated valve with a strain-type actuator and a method of operating same Alan B. Welch, Alain M. J. Touchette, Mike Hebbes, Richard Wing 2013-04-09 $20,941,000
8108131 Method and apparatus for using an accelerometer signal to detect misfiring in an internal combustion engine Jian Huang, Duran Cheung 2012-01-31 $12,362,000
7124959 Dual fuel injection valve and method of operating a dual fuel injection valve S. Michael Baker, Adrian Post, Tim Lennox, Bradley D. Douville, Alain Touchette 2006-10-24
7100577 Common rail directly actuated fuel injection valve with a pressurized hydraulic transmission device and a method of operating same Richard J. Ancimer, Mike Baker, Damien Clapa, Richard Wing 2006-09-05
6761325 Dual fuel injection valve and method of operating a dual fuel injection valve S. Michael Baker, Adrian Post, Tim Lennox, Alain Touchette, Bradley D. Douville 2004-07-13