Growing community of inventors

Eugene, OR, United States of America

Roger D Korstad

Average Co-Inventor Count = 2.00

ph-index = 4

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 = 56

Roger D KorstadRichard A Barbis (3 patents)Roger D KorstadKim R Duncan (1 patent)Roger D KorstadRoger D Korstad (4 patents)Richard A BarbisRichard A Barbis (21 patents)Kim R DuncanKim R Duncan (1 patent)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Bulk Handling Systems, Inc. (1 from 8 patents)


4 patents:

1. D606152 - Clown fish life vest

2. D606151 - Shark life vest

3. D604788 - Killer whale life vest

4. 7261209 - Multi-disc module and method of application

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12/20/2025
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