Growing community of inventors

Pleasant Ridge, MI, United States of America

Hans F Letzring

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

Hans F LetzringRobert Ross Roelofs (1 patent)Hans F LetzringHans F Letzring (1 patent)Robert Ross RoelofsRobert Ross Roelofs (7 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Ppg Industries Ohio, Inc. (1 from 1,742 patents)


1 patent:

1. 7618677 - Method of powder coating weldable substrates

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as of
12/19/2025
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