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Excelsior Springs, MO, United States of America

John Spencer

Average Co-Inventor Count = 1.00

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 = 0

John SpencerJohn Spencer (2 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Haldex Brake Corporation (2 from 62 patents)


2 patents:

1. 9211582 - Clamp ring and method for manufacturing a clamp ring

2. 8850663 - Clamp ring design

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as of
1/9/2026
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