Growing community of inventors

Yokohama, Japan

Kojiro Ishikawa

Average Co-Inventor Count = 3.00

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

Kojiro Ishikawa ↔ Tadanobu Nagumo (1 patent)Kojiro Ishikawa ↔ Kiyoshi Toyohara (1 patent)Kojiro IshikawaKojiro Ishikawa (1 patent)Tadanobu NagumoTadanobu Nagumo (5 patents)Kiyoshi ToyoharaKiyoshi Toyohara (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. The Yokohama Rubber Co., Ltd. (1 from 2,763 patents)


1 patent:

1. 4745954 - Tread pattern

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as of
12/19/2025
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