Growing community of inventors

Independence, KY, United States of America

Phillip R Merrifield

Average Co-Inventor Count = 2.40

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 = 8

Phillip R MerrifieldBrian Frank Weaver (2 patents)Phillip R MerrifieldRussell Hein (1 patent)Phillip R MerrifieldPhillip R Merrifield (2 patents)Brian Frank WeaverBrian Frank Weaver (12 patents)Russell HeinRussell Hein (5 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Progress Rail Services Corporation (2 from 119 patents)


2 patents:

1. 9988768 - System, method, and apparatus to restrict movement of railway guard bar

2. 9932054 - Double point derail switch

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as of
1/5/2026
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