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Arcadia, CA, United States of America

John Mathewson

Average Co-Inventor Count = 3.00

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 = 3

John MathewsonRobert M Setbacken (1 patent)John MathewsonPaul K Roach (1 patent)John MathewsonJohn Mathewson (1 patent)Robert M SetbackenRobert M Setbacken (11 patents)Paul K RoachPaul K Roach (1 patent)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Renco Encoders Inc. (1 from 15 patents)


1 patent:

1. 6642508 - System and method in an angle measuring system with an encoder attachment system for attaching an encoder to a motor shaft through the use of a spring generating a radial pressure

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12/16/2025
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