Growing community of inventors

Osaka, Japan

Tsugunobu Sakamoto

Average Co-Inventor Count = 2.10

ph-index = 9

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 = 295

Tsugunobu SakamotoDavid Gregory Llewellyn (7 patents)Tsugunobu SakamotoKazuhiro Doi (7 patents)Tsugunobu SakamotoChris Voshall (3 patents)Tsugunobu SakamotoTsugunobu Sakamoto (11 patents)David Gregory LlewellynDavid Gregory Llewellyn (71 patents)Kazuhiro DoiKazuhiro Doi (24 patents)Chris VoshallChris Voshall (11 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Mizuno USA, Inc. (11 from 68 patents)


11 patents:

1. D736872 - Iron-type golf club head

2. D736873 - Iron-type golf club head

3. D720027 - Iron-type golf club head

4. D669949 - Hybrid-type golf club

5. D669948 - Wood-type golf club

6. D669546 - Wood-type golf club

7. D659780 - Iron-type golf club

8. D650878 - Iron-type golf club head

9. D645103 - Iron-type golf club

10. D641444 - Iron-type golf club head

11. D629061 - Iron-type golf club

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as of
1/9/2026
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