Growing community of inventors

Yokohama, Japan

Sumio Takeishi

Average Co-Inventor Count = 4.00

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 = 17

Sumio Takeishi ↔ Kiyoshi Kawaguchi (1 patent)Sumio Takeishi ↔ Masao Ishinabe (1 patent)Sumio Takeishi ↔ Takashi Yazaki (1 patent)Sumio TakeishiSumio Takeishi (1 patent)Kiyoshi KawaguchiKiyoshi Kawaguchi (15 patents)Masao IshinabeMasao Ishinabe (8 patents)Takashi YazakiTakashi Yazaki (5 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Japan Crown Cork Co Ltd. (1 from 60 patents)


1 patent:

1. 4971213 - Plastic cap

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as of
12/30/2025
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