Growing community of inventors

Tokyo, Japan

Keiko Ishidai

Average Co-Inventor Count = 2.82

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 = 3

Keiko IshidaiKimihiko Ookubo (6 patents)Keiko IshidaiIssei Nakahara (5 patents)Keiko IshidaiKaori Ono (4 patents)Keiko IshidaiKoji Daifuku (4 patents)Keiko IshidaiRyohei Iwamoto (4 patents)Keiko IshidaiShinya Otsu (1 patent)Keiko IshidaiNoboru Sekine (1 patent)Keiko IshidaiKeiko Ishidai (8 patents)Kimihiko OokuboKimihiko Ookubo (8 patents)Issei NakaharaIssei Nakahara (9 patents)Kaori OnoKaori Ono (14 patents)Koji DaifukuKoji Daifuku (12 patents)Ryohei IwamotoRyohei Iwamoto (8 patents)Shinya OtsuShinya Otsu (28 patents)Noboru SekineNoboru Sekine (4 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Konica Minolta Business Technologies, Inc. (6 from 2,526 patents)

2. Konica Minolta, Inc. (1 from 4,240 patents)

3. Konica Minolta Medical and Graphic, Inc. (1 from 389 patents)

4. Merck Patent Gmbh (2,945 patents)


8 patents:

1. 10483471 - Organic electroluminescent element, method for producing organic electroluminescent element, display, and lighting device

2. 9062225 - Production process for colorant, colorant composition, toner, ink for ink jet recording and color filter

3. 8846965 - Toner for electrophotography and metal-containing compound

4. 8729285 - Copper complex compound and electrophotographic toner containing the same

5. 8329368 - Electrophotographic toner

6. 8269018 - Pyrazolotriazole compound and electrophotographic toner

7. 7943279 - Copper complex compound and electrophotographic toner containing the same

8. 7270938 - Photopolymerizable composition, light sensitive planographic printing plate material and manufacturing method of planographic printing plate

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as of
1/3/2026
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