Growing community of inventors

Aichi-ken, Japan

Seiko Ishikawa

Average Co-Inventor Count = 3.91

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 = 43

Seiko IshikawaMotokazu Yoshimura (2 patents)Seiko IshikawaTsuyoshi Nishibu (2 patents)Seiko IshikawaYasuhiro Funahashi (1 patent)Seiko IshikawaYoshihiko Hibino (1 patent)Seiko IshikawaKazunori Ikami (1 patent)Seiko IshikawaMasaru Yasuda (1 patent)Seiko IshikawaTakayoshi Urano (1 patent)Seiko IshikawaTatsuo Matsuda (1 patent)Seiko IshikawaHiroshi Matsuhashi (1 patent)Seiko IshikawaNaomi Moriguchi (1 patent)Seiko IshikawaKazuhiro Fujii (1 patent)Seiko IshikawaSeiko Ishikawa (3 patents)Motokazu YoshimuraMotokazu Yoshimura (9 patents)Tsuyoshi NishibuTsuyoshi Nishibu (2 patents)Yasuhiro FunahashiYasuhiro Funahashi (18 patents)Yoshihiko HibinoYoshihiko Hibino (18 patents)Kazunori IkamiKazunori Ikami (9 patents)Masaru YasudaMasaru Yasuda (4 patents)Takayoshi UranoTakayoshi Urano (3 patents)Tatsuo MatsudaTatsuo Matsuda (1 patent)Hiroshi MatsuhashiHiroshi Matsuhashi (1 patent)Naomi MoriguchiNaomi Moriguchi (1 patent)Kazuhiro FujiiKazuhiro Fujii (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Brother Kogyo Kabushiki-Kaisha (3 from 17,637 patents)

2. Intec Inc. (1 from 164 patents)

3. Xing Inc. (1 from 26 patents)


3 patents:

1. 5654690 - Fire alarm system

2. 4991135 - Electronic dictionary

3. 4747053 - Electronic dictionary

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as of
1/20/2026
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