Growing community of inventors

Sakura, Japan

Eiji Iijima

Average Co-Inventor Count = 2.73

ph-index = 4

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 = 47

Eiji IijimaHiroshi Watanabe (4 patents)Eiji IijimaShizuo Hayashi (2 patents)Eiji IijimaToshihiro Shirose (2 patents)Eiji IijimaYoshimi Nishimura (1 patent)Eiji IijimaEiji Iijima (5 patents)Hiroshi WatanabeHiroshi Watanabe (21 patents)Shizuo HayashiShizuo Hayashi (11 patents)Toshihiro ShiroseToshihiro Shirose (3 patents)Yoshimi NishimuraYoshimi Nishimura (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Kao Soap Company, Ltd. (5 from 341 patents)


5 patents:

1. 4226915 - Pressure-sensitive adhesive tape or sheet

2. 4165369 - Liquid hair rinse containing quaternary ammonium salts and a synthetic

3. 4160823 - Transparent hair rinsing composition

4. 4132678 - Transparent liquid shampoo

5. 4071475 - Transparent highly viscous liquid shampoo composition

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as of
12/29/2025
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