Growing community of inventors

Kalamazoo, MI, United States of America

Matthew Welker

Average Co-Inventor Count = 2.00

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

Matthew WelkerMark William Friedman (2 patents)Matthew WelkerMatthew Welker (2 patents)Mark William FriedmanMark William Friedman (9 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Humphrey Products Company (2 from 27 patents)


2 patents:

1. 12359739 - Expandable sealing sleeve with rigid support

2. 11662038 - Modular valve assembly

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as of
12/12/2025
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