YH

Yushi Hirayama

Ricoh Company: 31 patents #601 of 9,818Top 7%
Overall (All Time): #119,497 of 4,157,543Top 3%
31
Patents All Time

Issued Patents All Time

Showing 26–31 of 31 patents

Patent #TitleCo-InventorsDate
7548704 Image forming apparatus effectively conducting a process control Shin Hasegawa, Shinji Kato, Hitoshi Ishibashi, Kohta Fujimori, Naoto Watanabe +8 more 2009-06-16
7536121 Image forming apparatus and image density control method Kiichirou Shimizu, Shinji Kato, Shin Hasegawa, Kohta Fujimori, Nobutaka Takeuchi +3 more 2009-05-19
7493058 Image forming apparatus and toner concentration controlling method Nobutaka Takeuchi, Shin Hasegawa, Kohta Fujimori, Kayoko Tanaka, Hitoshi Ishibashi +8 more 2009-02-17
7260335 Image-information detecting device and image forming apparatus Shinji Kato, Shin Hasegawa, Hitoshi Ishibashi, Kohta Fujimori, Naoto Watanabe +6 more 2007-08-21
7251420 Method and apparatus for image forming capable of effectively detecting toner density Kohta Fujimori, Shin Hasegawa, Noboru Sawayama, Shinji Kato, Hitoshi Ishibashi +6 more 2007-07-31
7228081 Method and apparatus for image forming capable of controlling image-forming process conditions Shin Hasegawa, Shinji Kato, Noboru Sawayama, Takashi Enami, Fukutoshi Uchida +6 more 2007-06-05