Growing community of inventors

Tokyo, Japan

Masahiko Nagahama

Average Co-Inventor Count = 2.28

ph-index = 7

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 = 188

Masahiko NagahamaMasahiro Mori (2 patents)Masahiko NagahamaHiroshi Saegusa (2 patents)Masahiko NagahamaHideyo Asabuki (2 patents)Masahiko NagahamaHirohiko Takaoka (2 patents)Masahiko NagahamaTadayuki Asako (1 patent)Masahiko NagahamaToshinori Nishimura (1 patent)Masahiko NagahamaYoshiyuki Ichida (1 patent)Masahiko NagahamaRyohei Yuasa (1 patent)Masahiko NagahamaYasumori Takahashi (1 patent)Masahiko NagahamaYoshihisa Matsuura (1 patent)Masahiko NagahamaKosei Suzuki (1 patent)Masahiko NagahamaMasahiko Nagahama (11 patents)Masahiro MoriMasahiro Mori (41 patents)Hiroshi SaegusaHiroshi Saegusa (39 patents)Hideyo AsabukiHideyo Asabuki (10 patents)Hirohiko TakaokaHirohiko Takaoka (2 patents)Tadayuki AsakoTadayuki Asako (14 patents)Toshinori NishimuraToshinori Nishimura (8 patents)Yoshiyuki IchidaYoshiyuki Ichida (2 patents)Ryohei YuasaRyohei Yuasa (1 patent)Yasumori TakahashiYasumori Takahashi (1 patent)Yoshihisa MatsuuraYoshihisa Matsuura (1 patent)Kosei SuzukiKosei Suzuki (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. The Yokohama Rubber Co., Ltd. (10 from 2,760 patents)

2. Takata Corporation (1 from 1,161 patents)


11 patents:

1. D750520 - Speed measuring device

2. D705684 - Speed measuring device

3. 7520035 - Seatbelt apparatus

4. D438275 - Iron-type golf club head

5. 6079127 - Golf shoe and its spike

6. D422327 - Golf club head

7. D418183 - Golf club head

8. D417478 - Wood-type golf club head

9. D387201 - Golf bag

10. D376906 - Golf bag

11. D351442 - Golf club head

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as of
12/13/2025
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