Growing community of inventors

Kitakyushu, Japan

Hirofumi Yamamoto

Average Co-Inventor Count = 2.35

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 = 22

Hirofumi YamamotoMitsuhiro Higuchi (3 patents)Hirofumi YamamotoKatsumi Nonomura (1 patent)Hirofumi YamamotoOsamu Yamamoto (1 patent)Hirofumi YamamotoToshihiro Fukuda (1 patent)Hirofumi YamamotoShokichi Fujii (1 patent)Hirofumi YamamotoHirofumi Yamamoto (4 patents)Mitsuhiro HiguchiMitsuhiro Higuchi (5 patents)Katsumi NonomuraKatsumi Nonomura (1 patent)Osamu YamamotoOsamu Yamamoto (1 patent)Toshihiro FukudaToshihiro Fukuda (1 patent)Shokichi FujiiShokichi Fujii (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Toto Ltd. (4 from 1,192 patents)


4 patents:

1. 5918322 - Support structure for a toilet cover unit

2. 4928325 - Toilet seat structure capable of automatically feeding a seat covering

3. 4926504 - Toilet seat structure capable of automatically feeding a seat covering

4. 4926505 - Toilet seat structure capable of automatically feeding seat covering

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as of
12/21/2025
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