Growing community of inventors

Tokyo, Japan

Keiichi Hirai

Average Co-Inventor Count = 7.00

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

Keiichi HiraiNaoki Ohta (3 patents)Keiichi HiraiToshifumi Akiba (3 patents)Keiichi HiraiTatsuru Saito (3 patents)Keiichi HiraiTutomu Ebata (3 patents)Keiichi HiraiSadahiro Shimizu (3 patents)Keiichi HiraiToshiaki Tojo (3 patents)Keiichi HiraiKeiichi Hirai (3 patents)Naoki OhtaNaoki Ohta (77 patents)Toshifumi AkibaToshifumi Akiba (8 patents)Tatsuru SaitoTatsuru Saito (6 patents)Tutomu EbataTutomu Ebata (5 patents)Sadahiro ShimizuSadahiro Shimizu (4 patents)Toshiaki TojoToshiaki Tojo (3 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Daiichi Pharmaceutical Co., Ltd. (3 from 200 patents)


3 patents:

1. 6218548 - Production process of cyclic compound

2. 6013806 - Production process of cyclic compound

3. 5856518 - Production process of cyclic compound

Please report any incorrect information to support@idiyas.com
idiyas.com
as of
1/3/2026
Loading…