Growing community of inventors

Houston, TX, United States of America

David Kempher

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

David KempherRaymond V Nold, Iii (1 patent)David KempherDavid Kempher (1 patent)Raymond V Nold, IiiRaymond V Nold, Iii (16 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Schlumberger Technology Corporation (1 from 10,181 patents)


1 patent:

1. 8151893 - Sleeve assembly for downhole tools

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as of
1/11/2026
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