KN

Kiyofumi Nagai

Ricoh Company: 82 patents #57 of 9,818Top 1%
HC Hokuetsu Kishu Paper Co.: 1 patents #3 of 15Top 20%
NC Nippon Paper Industries Co.: 1 patents #263 of 535Top 50%
TF Tokyo University Of Science Foundation: 1 patents #82 of 252Top 35%
Overall (All Time): #21,735 of 4,157,543Top 1%
82
Patents All Time

Issued Patents All Time

Showing 1–25 of 82 patents

Patent #TitleCo-InventorsDate
10703911 Organic colorant, coloring composition, and inkjet ink Takuya Fujita, Yoshimasa Miyazawa, Tatsuya Tomura, Masahiro Yanagisawa, Yukishige Kondo +1 more 2020-07-07
9879207 Cleaning filling liquid, cartridge, cleaning filling method, and inkjet recording device Takashi Tamai, Tomohiro Inoue, Hiroshi Gotou, Michihiko Namba, Akihiko Gotoh 2018-01-30
9518190 Inkjet ink, ink cartridge, inkjet recording method, inkjet recording device, and inkjet recorded matter Hiroshi Gotou, Michihiko Namba, Hidetoshi Fujii, Yuuki Yokohama 2016-12-13
9163160 Aqueous ink for inkjet, ink cartridge, and inkjet recording device Naohiro Toda, Tomohiro Nakagawa, Hidefumi Nagashima, Juichi Furukawa, Ichiroh Fujii 2015-10-20
9085706 Inkjet ink, ink cartridge, inkjet recording method, inkjet recording device, and inkjet recorded matter Hiroshi Gotou, Michihiko Namba, Hidetoshi Fujii, Yuuki Yokohama 2015-07-21
9062217 Liquid composition, recording method, and recorded matter Hiroshi Gotou, Hidetoshi Fujii 2015-06-23
9034091 Inkjet recording ink set, inkjet recording method, and recorded matter Akihiko Matsuyama 2015-05-19
9028600 Inkjet ink, inkjet recording method, and inkjet recording device Hiroshi Goto, Akihiko Gotoh, Yuuki Yokohama, Hidetoshi Fujii 2015-05-12
8980408 Liquid composition, recording method, and recorded matter Hiroshi Gotou, Hidetoshi Fujii 2015-03-17
8899719 Image forming method and image forming apparatus Hidefumi Nagashima, Michihiko Namba 2014-12-02
8857962 Image forming method and image formed record Hiroshi Goto, Hisashi Habashi 2014-10-14
8845091 Variable printing medium having high glossiness, and recording method Tohru Ohshima, Michihiko Namba, Atsushi Hasegawa, Shuichi Oguma, Hisanori Sakatsume 2014-09-30
8752948 Inkjet recording ink containing fluorine based surfactant, inkjet recording ink set, and inkjet recording apparatus containing the inkjet recording ink Takashi Tamai, Michihiko Namba, Akihiko Matsuyama, Akihiko Gotoh 2014-06-17
8746869 Ink for inkjet recording, inkjet recording method using the same, ink cartridge housing the same, and recorded matter Akihiko Matsuyama, Ichiroh Fujii, Yuuki Yokohama, Hiroshi Gotou 2014-06-10
8651650 Inkjet recording ink, inkjet recording inkset, ink cartridge, inkjet recording method, and recorded matter Akihiko Matsuyama, Ichiroh Fujii, Yuuki Yokohama, Akihiko Gotoh, Mariko Kojima +2 more 2014-02-18
8608306 Inkjet recording ink, ink cartridge, inkjet recording apparatus, and ink recorded matter Mariko Kojima 2013-12-17
8586647 Recording ink, recording ink set, records, ink cartridge, recording method, and inkjet recording apparatus Mariko Kojima, Akihiko Gotoh, Michihiko Namba, Naoya Morohoshi, Tohru Ohshima 2013-11-19
8580159 Ink for inkjet recording, ink set for inkjet recording, ink media set for inkjet recording, ink cartridge, inkjet recording method, and inkjet recording apparatus Michihiko Namba, Akihiko Matsuyama, Naoya Morohoshi, Tohru Ohshima, Masayuki Koyano +1 more 2013-11-12
8556405 Ink for recording, and ink cartridge, ink recorded matter, inkjet recording apparatus and inkjet recording method using the same Hisashi Habashi, Michihiko Namba, Mariko Kojima, Akihiko Gotoh, Tamotsu Aruga 2013-10-15
8444755 Ink-jet recording ink, ink-jet recording ink set, ink-jet recording ink media set, ink cartridge, ink-jet recording method and ink-jet recording apparatus Michihiko Namba, Naoya Morohoshi, Tohru Ohshima, Akihiko Gotoh 2013-05-21
8435339 Ink set, ink cartridge, inkjet recording method, and inkjet recording apparatus Masayuki Koyano, Hiroshi Goto, Tamotsu Aruga, Toshiroh Tokuno 2013-05-07
8425031 Inkjet medium, ink and inkjet recording method Tohru Ohshima, Yuuji Kojima, Yasuharu Onogi 2013-04-23
8399076 Inkjet recording medium and inkjet recording method Taichi Watanabe, Yuji Sawa, Kei Takigawa, Naoya Morohoshi 2013-03-19
8383700 Pigment dispersion, recording ink, ink cartridge, ink-jet recording method and ink-jet recording apparatus Hiroshi Goto, Akihiko Matsuyama 2013-02-26
8337607 Recording ink, recording medium, ink media set, ink recorded matter, ink jet recording method, and ink jet recording apparatus Naoya Morohoshi, Tohru Ohshima 2012-12-25