Growing community of inventors

Elmhurst, IL, United States of America

Carl E Tack

Average Co-Inventor Count = 1.14

ph-index = 3

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 = 123

Carl E TackSergei G Guins (1 patent)Carl E TackCarl E Tack (4 patents)Sergei G GuinsSergei G Guins (6 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Transdyne, Inc. (4 from 10 patents)


4 patents:

1. 4428303 - Pedestal wear plate

2. 4405081 - Rail fastener with gauge adjustment

3. 4333403 - Retainer railway car truck bolster spring

4. 4203371 - Resilient pedestal wear plate

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as of
12/20/2025
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