Growing community of inventors

Ibaraki, Japan

Koei Igarashi

Average Co-Inventor Count = 5.14

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 = 74

Koei IgarashiHiroshi Miyaji (2 patents)Koei IgarashiMasao Ide (2 patents)Koei IgarashiShuki Gohda (2 patents)Koei IgarashiKonomu Tokunaga (2 patents)Koei IgarashiKoji Mihara (2 patents)Koei IgarashiMichiaki Fuji (1 patent)Koei IgarashiKenji Yao (1 patent)Koei IgarashiToshihiro Kushimoto (1 patent)Koei IgarashiKoei Igarashi (3 patents)Hiroshi MiyajiHiroshi Miyaji (14 patents)Masao IdeMasao Ide (3 patents)Shuki GohdaShuki Gohda (3 patents)Konomu TokunagaKonomu Tokunaga (3 patents)Koji MiharaKoji Mihara (2 patents)Michiaki FujiMichiaki Fuji (3 patents)Kenji YaoKenji Yao (3 patents)Toshihiro KushimotoToshihiro Kushimoto (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Kanebo, Limited (2 from 305 patents)

2. Aion Co., Ltd. (1 from 10 patents)


3 patents:

1. 6684447 - Cleaning sponge roller

2. 6502273 - Cleaning sponge roller

3. 5530086 - Polyester containing 9,9-bis(4-(2-hydroxyalkoxy)phenyl fluorene

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as of
1/5/2026
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