Growing community of inventors

Tokyo, Japan

Sumio Kamio

Average Co-Inventor Count = 5.00

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 = 4

Sumio KamioKyohta Koetsuka (1 patent)Sumio KamioNoriyuki Kamiya (1 patent)Sumio KamioTsuyoshi Imamura (1 patent)Sumio KamioMieko Kakegawa (1 patent)Sumio KamioSumio Kamio (1 patent)Kyohta KoetsukaKyohta Koetsuka (28 patents)Noriyuki KamiyaNoriyuki Kamiya (27 patents)Tsuyoshi ImamuraTsuyoshi Imamura (27 patents)Mieko KakegawaMieko Kakegawa (7 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Ricoh Company, Ltd. (1 from 28,566 patents)


1 patent:

1. 7127199 - Developing device and process cartridge with predetermined magnetic force for an image forming apparatus

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12/29/2025
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