Growing community of inventors

Richmond, VA, United States of America

Michael Lumpkin

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 = 2

Michael LumpkinMichael A Mason (1 patent)Michael LumpkinMichael Lumpkin (1 patent)Michael A MasonMichael A Mason (11 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Amsted Rail Company, Inc. (1 from 139 patents)


1 patent:

1. 11220279 - Insert and wear ring for a railway roller bearing

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12/31/2025
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