Growing community of inventors

Niigata, Japan

Tadashi Umehara

Average Co-Inventor Count = 5.33

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 = 18

Tadashi UmeharaMamoru Nozomi (3 patents)Tadashi UmeharaKunio Ohashi (2 patents)Tadashi UmeharaMitsuru Tokuyama (2 patents)Tadashi UmeharaHiroshi Kinashi (2 patents)Tadashi UmeharaToshiya Asari (2 patents)Tadashi UmeharaMichio Kawai (1 patent)Tadashi UmeharaRyoko Aso (1 patent)Tadashi UmeharaMotohisa Aoki (1 patent)Tadashi UmeharaOsamu Murakami (1 patent)Tadashi UmeharaJiro Taguti (1 patent)Tadashi UmeharaRyuji Nakayama (1 patent)Tadashi UmeharaRyuuji Nakayama (1 patent)Tadashi UmeharaTadashi Umehara (4 patents)Mamoru NozomiMamoru Nozomi (22 patents)Kunio OhashiKunio Ohashi (42 patents)Mitsuru TokuyamaMitsuru Tokuyama (31 patents)Hiroshi KinashiHiroshi Kinashi (19 patents)Toshiya AsariToshiya Asari (2 patents)Michio KawaiMichio Kawai (18 patents)Ryoko AsoRyoko Aso (7 patents)Motohisa AokiMotohisa Aoki (3 patents)Osamu MurakamiOsamu Murakami (3 patents)Jiro TagutiJiro Taguti (1 patent)Ryuji NakayamaRyuji Nakayama (1 patent)Ryuuji NakayamaRyuuji Nakayama (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Mitsubishi Kasei Corporation (3 from 499 patents)

2. Sharp Kabushiki Kaisha Corporation (2 from 25,530 patents)

3. Mitsubhishi Kasei Corporation (1 from 1 patent)


4 patents:

1. 5665502 - Electrophotographic photoreceptor and method for producing the

2. 5536607 - Image correcting method using an electrophotographic photoreceptor

3. 5292607 - Electrophotographic photoreceptor containing polycarbonate resin as a

4. 4972569 - Method for rotatingly transferring hollow cylindrical articles

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