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Rolling Hills Estates, CA, United States of America

Richard Shih-Teng Chang

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

Richard Shih-Teng Chang ↔ Edmund Emil Landsinger (1 patent)Richard Shih-Teng ChangRichard Shih-Teng Chang (1 patent)Edmund Emil LandsingerEdmund Emil Landsinger (4 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Mattel, Inc. (1 from 1,702 patents)


1 patent:

1. 4100728 - Mechanical digital stopwatch

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12/18/2025
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