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Terre Haute, IN, United States of America

Jon Ashley

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

Jon AshleyMichael Mitchell (2 patents)Jon AshleyJon Ashley (2 patents)Michael MitchellMichael Mitchell (2 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Sony Dadc US Inc (2 from 11 patents)


2 patents:

1. 9472232 - Dual-sided optical discs with normally oriented and inverted text patterns

2. 8850981 - Single-sided printing providing dual-sided reading of print on optical discs

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as of
12/15/2025
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