Growing community of inventors

Big Bear Lake, CA, United States of America

Duane Bergmann

Average Co-Inventor Count = 3.00

ph-index = 1

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 3

Duane Bergmann ↔ John Park (2 patents)Duane Bergmann ↔ Geoff Legg (2 patents)Duane Bergmann ↔ Asit Singhal (2 patents)Duane Bergmann ↔ Craig Fennessy (1 patent)Duane BergmannDuane Bergmann (3 patents)John ParkJohn Park (8 patents)Geoff LeggGeoff Legg (2 patents)Asit SinghalAsit Singhal (2 patents)Craig FennessyCraig Fennessy (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Acd Inc. (2 from 14 patents)

2. Acd Company (1 from 1 patent)


3 patents:

1. 12241552 - Turboexpander labyrinth seal

2. 11686390 - Turboexpander labyrinth seal

3. 9945517 - Portable gas filling system

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as of
1/15/2026
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