Growing community of inventors

Rockford, IL, United States of America

Darrel E Smith

Average Co-Inventor Count = 1.00

ph-index = 2

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 = 24

Darrel E SmithDarrel E Smith (2 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Ingersoll Cutting Tool Company (2 from 26 patents)


2 patents:

1. 4645386 - Thread-cutting apparatus

2. 4531863 - Thread-cutting apparatus

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as of
12/17/2025
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