Growing community of inventors

Tokyo, Japan

Yumi Takahashi

Average Co-Inventor Count = 7.00

ph-index = 1

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 = 10

Yumi Takahashi ↔ Susumu Saito (2 patents)Yumi Takahashi ↔ Hiroshi Koizumi (2 patents)Yumi Takahashi ↔ Akio Kobayashi (2 patents)Yumi Takahashi ↔ Kazuo Abe (2 patents)Yumi Takahashi ↔ Michiko Nakanishi (2 patents)Yumi Takahashi ↔ Makoto Taya (2 patents)Yumi TakahashiYumi Takahashi (2 patents)Susumu SaitoSusumu Saito (136 patents)Hiroshi KoizumiHiroshi Koizumi (59 patents)Akio KobayashiAkio Kobayashi (37 patents)Kazuo AbeKazuo Abe (16 patents)Michiko NakanishiMichiko Nakanishi (15 patents)Makoto TayaMakoto Taya (5 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Kabushiki Kaisha Topcon (2 from 1,033 patents)


2 patents:

1. 6817929 - Lens periphery edge processing apparatus

2. 6497614 - Lens periphery edge processing apparatus

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as of
1/10/2026
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