YK

Yutaka Koizumi

Canon: 83 patents #198 of 19,416Top 2%
Ricoh Company: 25 patents #815 of 9,818Top 9%
YE Yokogawa Electric: 3 patents #261 of 1,441Top 20%
NE Nec: 2 patents #5,510 of 14,502Top 40%
NC Nippon Electric Co.: 1 patents #251 of 792Top 35%
HI Hitachi: 1 patents #17,742 of 28,497Top 65%
RI Ricon: 1 patents #20 of 48Top 45%
HC Hitachi Electric Systems Co.: 1 patents #6 of 15Top 40%
Overall (All Time): #10,938 of 4,157,543Top 1%
115
Patents All Time

Issued Patents All Time

Showing 51–75 of 115 patents

Patent #TitleCo-InventorsDate
5933163 Ink jet recording apparatus Hiroshi Sugitani, Masaki Inaba, Masami Ikeda, Masami Kasamoto, Tsuyoshi Orikasa +9 more 1999-08-03
5870113 Liquid jet recording apparatus and method useable with removable recording head 1999-02-09
5867200 Print head, and print pre-heat method and apparatus using the same Hiroki Tajima, Toshio Kashino, Seiichiro Karita, Haruhiko Terai, Kouichi Omata +1 more 1999-02-02
D400573 Ink cartridge for printer Manabu Inoue, Tsutomu Abe, Kazuo Haida 1998-11-03
5826333 Method of manufacturing an ink jet head Masaru Iketani, Toshio Kashino, Seiichiro Karita, Haruhiko Terai, Kouichi Omata +3 more 1998-10-27
5798780 Recording element driving unit having extra driving element to facilitate assembly and apparatus using same Yasutomo Watanabe 1998-08-25
5774151 Liquid ejecting head, liquid ejecting apparatus and method of producing said liquid ejecting head Hiroshi Sugitani, Masaki Inaba, Masami Ikeda, Masami Kasamoto, Tsuyoshi Orikasa +5 more 1998-06-30
5748213 Ink jet head having plural elemental substrates, apparatus having the ink jet head, and method for manufacturing the ink jet head Seiichiro Karita, Hiroshi Sugitani, Toshio Kashino, Haruhiko Terai, Akira Goto +5 more 1998-05-05
5745129 Ink jet head, ink jet apparatus and driving method therefor Jiro Moriyama, Toshiaki Hirosawa 1998-04-28
5742136 Linear motor drive system Yutaka Ono, Haruo Higuchi, Shigeru Hashida 1998-04-21
5738916 Ultraviolet-curing composition, pattern forming method making use of the same, printed-wiring board and its production Hiromichi Noguchi, Hiroshi Sugitani, Tadayoshi Inamoto, Kiyomi Aono, Yoshie Nakata 1998-04-14
D390259 Ink cartridge for printer Manabu Inoue, Tsutomu Abe, Kazuo Haida 1998-02-03
5682190 Ink jet head and apparatus having an air chamber for improving performance Toshiaki Hirosawa, Jiro Moriyama, Mineo Kaneko, Torachika Osada, Hidemi Kubota 1997-10-28
5659343 Method of forming an ink jet recording head having an orifice plate with positioning openings for precisely locating discharge ports in a recording apparatus Minoru Nozawa, Toshihiro Mori, Atsushi Saito 1997-08-19
5646659 Ink jet recording apparatus, and method with control of ink drops and ink mist Jiro Moriyama, Hisashi Fukushima, Toshiaki Hirosawa, Torachika Osada, Haruhiko Moriguchi +2 more 1997-07-08
5608435 Method for producing ink jet head having a plated bump-shaped electrode Yasutomo Watanabe 1997-03-04
5594350 Signal detecting circuit for digital controller Minoru Banjo, Takeshi Wakugawa 1997-01-14
D375975 Printing head Toshio Kashino, Seiichiro Karita, Kiyomi Aono, Kouichi Omata, Hiroki Tajima 1996-11-26
5561448 Ink jet recording apparatus for recovering recording head Mineo Kaneko, Hidemi Kubota, Torachika Osada, Toshiaki Hirosawa, Jiro Moriyama 1996-10-01
5559536 Recovery device having a protruding portion providing reduced pressure for improved recovery and method using same Atsushi Saito, Toshihiro Mori, Minoru Nozawa 1996-09-24
5457485 Ink jet recording apparatus Jiro Moriyama, Hiroto Matsuda, Toshiaki Hirosawa, Torachika Osada, Hidemi Kubota 1995-10-10
5442374 Color display 1995-08-15
5357268 Ink jet recording head in which the ejection elements are driven in blocks Hideaki Kishida, Akira Katayama, Kimiyuki Hayasaki, Nobuyuki Watanabe, Jiro Moriyama +4 more 1994-10-18
5343227 Ink jet recording apparatus and ink jet recording head with means reducing the amount of warp Toshiaki Hirosawa, Torachika Osada, Jiro Moriyama, Hidemi Kubota, Mineo Kaneko +3 more 1994-08-30
5291215 Ink jet recording apparatus with a thermally stable ink jet recording head Minoru Nozawa, Toshihiro Mori, Atsushi Saito 1994-03-01