Growing community of inventors

Highland Park, IL, United States of America

Richard M Woldenberg

Average Co-Inventor Count = 2.18

ph-index = 4

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 = 46

Richard M WoldenbergLisa Hoffman (2 patents)Richard M WoldenbergDennis K Goldman (1 patent)Richard M WoldenbergYuen Po Man (1 patent)Richard M WoldenbergMary Watanabe (1 patent)Richard M WoldenbergRichard M Woldenberg (4 patents)Lisa HoffmanLisa Hoffman (2 patents)Dennis K GoldmanDennis K Goldman (2 patents)Yuen Po ManYuen Po Man (2 patents)Mary WatanabeMary Watanabe (2 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Learning Resources, Inc. (2 from 23 patents)

2. Other (1 from 832,718 patents)

3. Eta/cuisenaire (1 from 1 patent)


4 patents:

1. 7018210 - Method and apparatus for teaching and learning reading

2. 6086105 - Book for packaging activity pieces in an activity kit

3. 5851118 - Digital and analog teaching clock

4. 5597308 - Assembly including interlocking components for teaching mathematical

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as of
12/9/2025
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