Growing community of inventors

Tochigi, Japan

Kenji Sumida

Average Co-Inventor Count = 2.88

ph-index = 4

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 = 58

Kenji SumidaKotaro Ono (3 patents)Kenji SumidaKazunori Kagei (2 patents)Kenji SumidaYoshishige Endo (1 patent)Kenji SumidaMasahiko Ono (1 patent)Kenji SumidaYoshinori Otobe (1 patent)Kenji SumidaShigeo Yamagata (1 patent)Kenji SumidaNorimasa Nosaka (1 patent)Kenji SumidaFumihiko Matsuda (1 patent)Kenji SumidaYoshitsugu Kobayashi (1 patent)Kenji SumidaMinoru Ono (1 patent)Kenji SumidaToshitaka Nakaya (1 patent)Kenji SumidaKenji Sumida (6 patents)Kotaro OnoKotaro Ono (7 patents)Kazunori KageiKazunori Kagei (5 patents)Yoshishige EndoYoshishige Endo (42 patents)Masahiko OnoMasahiko Ono (14 patents)Yoshinori OtobeYoshinori Otobe (6 patents)Shigeo YamagataShigeo Yamagata (5 patents)Norimasa NosakaNorimasa Nosaka (5 patents)Fumihiko MatsudaFumihiko Matsuda (1 patent)Yoshitsugu KobayashiYoshitsugu Kobayashi (1 patent)Minoru OnoMinoru Ono (1 patent)Toshitaka NakayaToshitaka Nakaya (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Washi Kosan Co., Ltd. (5 from 11 patents)

2. Hitachi, Ltd. (1 from 42,485 patents)

3. Nippon Mayer Co., Ltd. (1 from 8 patents)


6 patents:

1. 7702573 - Debt reduction method and device thereof

2. 6183081 - Kit providing independent right and left eyeglass lenses with side frames and method for assembly thereof

3. 6075652 - Convex-microgranular surface structure

4. 5709922 - Transparent article and process for producing the same

5. 5675993 - Patterning method and device in warp knitting machine

6. 4978101 - Solenoid controlled valve ofr liquid preparation

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as of
12/8/2025
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