Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Mike Duffield — 2 Patents

BOBorgwarner: 1 patents #797 of 1,600Top 50%
PCPetro-Chem Development Co.: 1 patents #4 of 4Top 100%
Tulsa, OK: #829 of 2,344 inventorsTop 40%
Oklahoma: #4,543 of 12,736 inventorsTop 40%
Overall (All Time): #1,709,992 of 4,157,543Top 45%
2 Patents All Time
Mike Duffield has been granted 2 US patents while listed as an inventor at Borgwarner. The first was granted in 2001 and the most recent in September 2002. Mike Duffield ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Mike Duffield in Tulsa, OK, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
6453859 Multi-mode control system for variable camshaft timing devices Frank R. Smith, Braman Wing, Marty Gardner 2002-09-24 $4,464,000
6325535 In-situ radiant heat flux probe cooled by suction of ambient air William C. Gibson, James T. Eischen, Robert Gibson 2001-12-04