Growing community of inventors

Kitakyushu, Japan

Masafumi Ishikawa

Average Co-Inventor Count = 2.43

ph-index = 12

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 = 415

Masafumi IshikawaMinoru Tani (10 patents)Masafumi IshikawaKazuki Otsuka (9 patents)Masafumi IshikawaMitsuya Obara (8 patents)Masafumi IshikawaShogo Takayama (3 patents)Masafumi IshikawaHajime Kakihana (2 patents)Masafumi IshikawaYuji Yoshioka (2 patents)Masafumi IshikawaLea Mari Mendoza (2 patents)Masafumi IshikawaYusuke Takiguchi (2 patents)Masafumi IshikawaMisa Inomoto (2 patents)Masafumi IshikawaYasushi Takahashi (1 patent)Masafumi IshikawaSteven Chen (1 patent)Masafumi IshikawaRina Ogata (1 patent)Masafumi IshikawaHiroshi Shimoda (1 patent)Masafumi IshikawaAyaka Shigeta (1 patent)Masafumi IshikawaChikahiro Kakimoto (1 patent)Masafumi IshikawaHiroyuki Takeuchi (1 patent)Masafumi IshikawaMasafumi Ishikawa (29 patents)Minoru TaniMinoru Tani (76 patents)Kazuki OtsukaKazuki Otsuka (15 patents)Mitsuya ObaraMitsuya Obara (47 patents)Shogo TakayamaShogo Takayama (16 patents)Hajime KakihanaHajime Kakihana (51 patents)Yuji YoshiokaYuji Yoshioka (32 patents)Lea Mari MendozaLea Mari Mendoza (27 patents)Yusuke TakiguchiYusuke Takiguchi (9 patents)Misa InomotoMisa Inomoto (2 patents)Yasushi TakahashiYasushi Takahashi (18 patents)Steven ChenSteven Chen (17 patents)Rina OgataRina Ogata (15 patents)Hiroshi ShimodaHiroshi Shimoda (11 patents)Ayaka ShigetaAyaka Shigeta (6 patents)Chikahiro KakimotoChikahiro Kakimoto (2 patents)Hiroyuki TakeuchiHiroyuki Takeuchi (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Toto Ltd. (29 from 1,192 patents)


29 patents:

1. D941446 - Toilet tank

2. D886966 - Water closet

3. D884851 - Water closet

4. D884853 - Water closet

5. D884852 - Water closet

6. D884847 - Water closet

7. D882739 - Water closet

8. D882741 - Water closet

9. D882742 - Water closet

10. D882728 - Water closet

11. D844121 - Toilet seat

12. D792565 - Water closet

13. D758019 - Hand dryer

14. D747449 - Toilet seat

15. D742591 - Hand dryer

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as of
12/19/2025
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