Growing community of inventors

Little Rock, AR, United States of America

Charles D Robertson, Jr

Average Co-Inventor Count = 1.00

ph-index = 3

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 = 104

Charles D Robertson, JrCharles D Robertson, Jr (3 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Other (1 from 832,812 patents)

2. Day Runner, Inc. (1 from 19 patents)


3 patents:

1. D480428 - Frameless cork board

2. D410250 - Marker board

3. 5176522 - Erasable marker board assembly

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as of
12/20/2025
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