Growing community of inventors

Tokyo, Japan

Keiko Doi

Average Co-Inventor Count = 2.00

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 = 48

Keiko DoiMasatsune Sasaki (5 patents)Keiko DoiKeiko Doi (5 patents)Masatsune SasakiMasatsune Sasaki (6 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Tomy Company, Ltd. (5 from 577 patents)


5 patents:

1. D382025 - Motorized block for toy

2. D374044 - Toy figurine

3. D373801 - Toy figurine

4. D373802 - Toy figurine

5. D373799 - Toy figurine

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as of
1/22/2026
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