Growing community of inventors

Kisarazu, Japan

Koji Ohkawa

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

Koji Ohkawa ↔ Naomi Okamoto (1 patent)Koji Ohkawa ↔ Takeshi Shoda (1 patent)Koji OhkawaKoji Ohkawa (1 patent)Naomi OkamotoNaomi Okamoto (14 patents)Takeshi ShodaTakeshi Shoda (5 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Bridgestone Corporation (1 from 5,124 patents)

2. Ube Industries, Inc. (1 from 1,432 patents)


1 patent:

1. 6114451 - Rubber composition

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as of
1/5/2026
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