KO

Koichiro Oyama

Ricoh Company: 11 patents #2,054 of 9,818Top 25%
Overall (All Time): #437,611 of 4,157,543Top 15%
11
Patents All Time

Issued Patents All Time

Showing 1–11 of 11 patents

Patent #TitleCo-InventorsDate
12344756 Liquid composition, method of applying liquid, device for applying liquid, pre-processing fluid, and set of pre-processing fluid and ink Shun Saito, Kento SUGITA, Mizuki Kuroha, Satoshi Takahashi, Yuuki Yokohama +1 more 2025-07-01
11760893 Ink, image forming apparatus, and image forming method Kento SUGITA, Yuuki Yokohama, Azumi Miyaake, Satoshi Takahashi, Mizuki Kuroha 2023-09-19
10844235 Ink, method of manufacturing ink, and ink cartridge Yuusuke Koizuka, Kazukiyo Nagai, Tomoyuki Shimada, Shigeyuki Harada, Akihiko Matsuyama +3 more 2020-11-24
10836171 Ink and cleaning liquid set, inkjet printing device, inkjet printing method, and method of cleaning nozzle surface of inkjet discharging head Amika Sagara, Yuuki Yokohama, Masaki Kudo, Yuusuke Koizuka, Akihiko Matsuyama 2020-11-17
10807377 Ink, ink cartridge, image forming method, and printed matter Takuya Yamazaki, Shigeyuki Harada, Takuya Saiga, Hiroshi Gotou, Yuusuke Koizuka 2020-10-20
10323134 Particulate polyamide, and method for preparing the particulate polyamide Yoko Arai, Atsumi Yamabe, Yasuo Kamada 2019-06-18
10273373 Ink and method for producing same, and ink stored container, printing method, and printing apparatus Yuusuke Koizuka, Kazukiyo Nagai, Tomoyuki Shimada, Shigeyuki Harada, Takuya Yamazaki +3 more 2019-04-30
10233341 Ink, method of manufacturing ink, and ink cartridge Yuusuke Koizuka, Kazukiyo Nagai, Tomoyuki Shimada, Shigeyuki Harada, Akihiko Matsuyama +3 more 2019-03-19
10138344 Particulate polyamide, and method for preparing the particulate polyamide Yoko Arai, Atsumi Yamabe, Yasuo Kamada 2018-11-27
10000656 Ink, recorded matter, ink container, recording device, and recording method Yoshiki Yanagawa, Akihiko Matsuyama, Kazukiyo Nagai, Tomoyuki Shimada, Shigeyuki Harada +3 more 2018-06-19
9896530 Copolymer, coloring material dispersion, ink, and ink store container Shigeyuki Harada, Kazukiyo Nagai, Yuusuke Koizuka, Tomoyuki Shimada, Takuya Yamazaki +3 more 2018-02-20