Growing community of inventors

Nara, Japan

Katsumasa Otake

Average Co-Inventor Count = 4.05

ph-index = 5

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 = 60

Katsumasa OtakeTakashi Omura (6 patents)Katsumasa OtakeYutaka Kayane (6 patents)Katsumasa OtakeYasuo Tezuka (3 patents)Katsumasa OtakeAkira Takeshita (3 patents)Katsumasa OtakeKunihiko Imada (2 patents)Katsumasa OtakeNaoki Harada (1 patent)Katsumasa OtakeTetsuya Miyamoto (1 patent)Katsumasa OtakeTakashi Ikeda (1 patent)Katsumasa OtakeMasaki Sunami (1 patent)Katsumasa OtakeKaneo Yokoyama (1 patent)Katsumasa OtakeMikoto Takahashi (1 patent)Katsumasa OtakeKatsumasa Otake (8 patents)Takashi OmuraTakashi Omura (71 patents)Yutaka KayaneYutaka Kayane (39 patents)Yasuo TezukaYasuo Tezuka (17 patents)Akira TakeshitaAkira Takeshita (16 patents)Kunihiko ImadaKunihiko Imada (15 patents)Naoki HaradaNaoki Harada (59 patents)Tetsuya MiyamotoTetsuya Miyamoto (15 patents)Takashi IkedaTakashi Ikeda (7 patents)Masaki SunamiMasaki Sunami (7 patents)Kaneo YokoyamaKaneo Yokoyama (4 patents)Mikoto TakahashiMikoto Takahashi (3 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Sumitomo Chemical Company, Limited (8 from 6,893 patents)


8 patents:

1. 4937326 - Reactive scarlet dyes having both monochlorotriazinyl and vinylsulfone

2. 4935500 - Metallized formazan compounds having two fiber reactive groups linked by

3. 4841031 - Reactive dye having both monochlorotriazinyl and vinylsulfone type

4. 4631341 - Anthraquinone compound having both monohalogenotriazinyl and

5. 4626589 - Organic dye compound having both pyridiniotriazinyl and vinylsulfone

6. 4551150 - Method for dyeing cellulose fiber material using fiber-reactive disazo

7. 4540418 - Reactive dye composition

8. 4511507 - Monoazo compound having both monochlorotriazinyl and vinylsulfone type

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as of
12/15/2025
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