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Yuuki Yokohama

Ricoh Company: 28 patents #700 of 9,818Top 8%
Overall (All Time): #135,255 of 4,157,543Top 4%
28
Patents All Time

Issued Patents All Time

Showing 26–28 of 28 patents

Patent #TitleCo-InventorsDate
8317913 Inkjet ink, and ink cartridge, inkjet recording method, inkjet recording apparatus and ink record using the same Shigeo Hatada, Keishi Taniguchi, Shigeru Kusakata, Ichiroh Fujii, Akihiko Matsuyama 2012-11-27
8192009 Ink set and ink cartridge for ink-jet recording, ink-jet recording method, and ink-jet recording apparatus Akihiko Gotoh, Mariko Kojima, Hisashi Habashi 2012-06-05
8100504 Inkjet recording apparatus and inkjet recording method Tomohiro Inoue 2012-01-24