Growing community of inventors

Kanagawa, Japan

Sadao Kawashima

Average Co-Inventor Count = 2.29

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 = 30

Sadao KawashimaTakashi Sonoh (1 patent)Sadao KawashimaYasutaka Sakumoto (1 patent)Sadao KawashimaYoshisuke Hanasato (1 patent)Sadao KawashimaChiharu Ito (1 patent)Sadao KawashimaMasayoshi Morioka (1 patent)Sadao KawashimaHeiichi Takei (1 patent)Sadao KawashimaSadao Kawashima (4 patents)Takashi SonohTakashi Sonoh (1 patent)Yasutaka SakumotoYasutaka Sakumoto (1 patent)Yoshisuke HanasatoYoshisuke Hanasato (1 patent)Chiharu ItoChiharu Ito (1 patent)Masayoshi MoriokaMasayoshi Morioka (1 patent)Heiichi TakeiHeiichi Takei (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Asahi Fiber Glass Company, Limited (3 from 44 patents)

2. Asahi Glass Company, Limited (1 from 2,560 patents)


4 patents:

1. 4997693 - Fiber-reinforced resin material and fiber-reinforced resin laminate

2. 4481241 - Core material for fiber reinforced plastic and process for its production

3. 4418113 - Reinforcing mat for fiber reinforced plastic material

4. 4368232 - Glass fiber mat and method of preparation thereof

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as of
1/23/2026
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