Growing community of inventors

Kurume, Japan

Yumi Sakai

Average Co-Inventor Count = 4.00

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 = 2

Yumi SakaiChihaya Adachi (1 patent)Yumi SakaiHiroshi Miyazaki (1 patent)Yumi SakaiNaoto Noutsuka (1 patent)Yumi SakaiYumi Sakai (1 patent)Chihaya AdachiChihaya Adachi (84 patents)Hiroshi MiyazakiHiroshi Miyazaki (21 patents)Naoto NoutsukaNaoto Noutsuka (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Kyushu University (1 from 431 patents)

2. Nippon Steel & Sumikin Chemical Co., Ltd. (1 from 88 patents)

3. Dyden Co. (1 from 1 patent)


1 patent:

1. 9957260 - Organic metal complex, light emitting material, delayed fluorescent material, and organic light emitting device

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as of
12/7/2025
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