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Duane Bergmann — 4 Patents

ACAcd: 3 patents #1 of 21Top 5%
ENEnergent: 1 patents #2 of 14Top 15%
Big Bear Lake, CA: #15 of 63 inventorsTop 25%
California: #126,026 of 386,348 inventorsTop 35%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
Duane Bergmann has been granted 4 US patents while listed as an inventor at Acd. The first was granted in 2004 and the most recent in March 2025. Duane Bergmann ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Duane Bergmann in Big Bear Lake, CA, US.

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
12241552 Turboexpander labyrinth seal John Park, Asit Singhal, Geoff Legg 2025-03-04
11686390 Turboexpander labyrinth seal John Park, Asit Singhal, Geoff Legg 2023-06-27
9945517 Portable gas filling system Craig J. Fennessy 2018-04-17
6742337 Waste heat recovery system Lance G. Hays 2004-06-01

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