Growing community of inventors

Gurnee, IL, United States of America

John Cerwin

Average Co-Inventor Count = 1.09

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 = 88

John CerwinWolfgang Fink (1 patent)John CerwinChristopher P Adams (1 patent)John CerwinJohn Cerwin (8 patents)Wolfgang FinkWolfgang Fink (26 patents)Christopher P AdamsChristopher P Adams (20 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Other (7 from 832,843 patents)


8 patents:

1. 11684256 - Eye movement in response to visual stimuli for assessment of ophthalmic and neurological conditions

2. 11571753 - Rotary boring tool alignment device and system

3. 10739127 - Rotary boring tool alignment and depth indication tools

4. 10150167 - Rotary boring tool alignment and depth indication system

5. 8069579 - Train rail alignment and distance system

6. 7992311 - Rotary boring tool alignment and depth indication system

7. 7900368 - Train rail alignment and distance system

8. 7447565 - Electronic alignment system

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as of
12/30/2025
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