Growing community of inventors

Yokohama, Japan

Sugiyama Keisuke

Average Co-Inventor Count = 9.00

ph-index = 1

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 = 6

Sugiyama KeisukeToshiyuki Uchida (1 patent)Sugiyama KeisukeJoh Ebara (1 patent)Sugiyama KeisukeNoriaki Funamoto (1 patent)Sugiyama KeisukeYasuhisa Ehara (1 patent)Sugiyama KeisukeKouji Amanai (1 patent)Sugiyama KeisukeKobayashi Kazuhiko (1 patent)Sugiyama KeisukeHanda Seiichi (1 patent)Sugiyama KeisukeMatsuda Yuji (1 patent)Sugiyama KeisukeSugiyama Keisuke (1 patent)Toshiyuki UchidaToshiyuki Uchida (38 patents)Joh EbaraJoh Ebara (36 patents)Noriaki FunamotoNoriaki Funamoto (35 patents)Yasuhisa EharaYasuhisa Ehara (32 patents)Kouji AmanaiKouji Amanai (9 patents)Kobayashi KazuhikoKobayashi Kazuhiko (1 patent)Handa SeiichiHanda Seiichi (1 patent)Matsuda YujiMatsuda Yuji (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Ricoh Company, Ltd. (1 from 28,584 patents)


1 patent:

1. 7603061 - Image forming apparatus

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as of
1/8/2026
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