Growing community of inventors

Chiba, Japan

Keiji Sugiura

Average Co-Inventor Count = 5.00

ph-index = 3

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 = 16

Keiji Sugiura ↔ Yoshihiro Naruse (4 patents)Keiji Sugiura ↔ Masato Takagi (4 patents)Keiji Sugiura ↔ Norihide Enomoto (4 patents)Keiji Sugiura ↔ Kimiyo Ohtsu (4 patents)Keiji SugiuraKeiji Sugiura (4 patents)Yoshihiro NaruseYoshihiro Naruse (37 patents)Masato TakagiMasato Takagi (9 patents)Norihide EnomotoNorihide Enomoto (9 patents)Kimiyo OhtsuKimiyo Ohtsu (4 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Kawasaki Steel Corporation (4 from 1,256 patents)


4 patents:

1. 5229449 - Copolymer of polymerizable components in naphtha oil and maleic

2. 5191049 - Copolymer of polymerizable components in naphtha oil and maleic

3. 5179170 - Dispersant and cement admixture

4. 5166275 - Copolymer of polymerizable components in naphtha oil and maleic

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as of
12/9/2025
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