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USPTO Patent Rankings Data through Dec 31, 2025
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Duncan Bickerton — 5 Patents

KEK&N Engineering: 5 patents #10 of 19Top 55%
Warrington, GB: #17 of 259 inventorsTop 7%
Overall (All Time): #907,971 of 4,157,543Top 25%
5 Patents All Time
Duncan Bickerton has been granted 5 US patents while listed as an inventor at K&N Engineering. All of these patents were granted in 1998. Duncan Bickerton ranks #907,971 of 4,157,543 US inventors in our database (top 21.8%). Patent records list Duncan Bickerton in Warrington, GB.

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
D403414 Cylindrical pleated air filter with top and sidewall filtering areas Nathan E. Shelton 1998-12-29
D403416 Air filter with top filtering area and tapered sidewall filtering area Nathan E. Shelton 1998-12-29
D401942 Filter cover Nathan E. Shelton 1998-12-01
D401597 Shallow cylindrical air filter with top and side filtering areas Nathan E. Shelton 1998-11-24
D401684 Air Filter Nathan E. Shelton 1998-11-24