YT

Yasufumi Takahashi

Ricoh Company: 42 patents #327 of 9,818Top 4%
PA Panasonic: 27 patents #613 of 21,108Top 3%
SC Sanyo Electric Co.: 11 patents #436 of 6,347Top 7%
HI Hitachi: 5 patents #7,555 of 28,497Top 30%
FU Fujifilm: 5 patents #1,507 of 4,519Top 35%
UI Ube Industries: 2 patents #593 of 1,686Top 40%
FL Fujitsu Semiconductor Limited: 1 patents #612 of 1,301Top 50%
Overall (All Time): #17,541 of 4,157,543Top 1%
91
Patents All Time

Issued Patents All Time

Showing 51–75 of 91 patents

Patent #TitleCo-InventorsDate
8953976 Developing device, image forming apparatus, and process cartridge Kunihiro Ohyama, Masayuki Yamane, Takeshi Uchitani 2015-02-10
8909071 Apparatus and method for preventing an information storage device from falling from a removable device Kunihiro Ohyama, Masayuki Yamane, Takeshi Uchitani, Tadashi Hayakawa, Takuji Takahashi +5 more 2014-12-09
8855535 Toner supply device and image forming apparatus 2014-10-07
8843034 Toner container, toner container frame, and image forming apparatus incorporating same Masayuki Yamane, Tadashi Hayakawa, Kunihiro Ohyama, Takeshi Uchitani 2014-09-23
8690555 Two-stage rotary expander, expander-compressor unit, and refrigeration cycle apparatus Takeshi Ogata, Hidetoshi Taguchi, Hiroshi Hasegawa, Atsuo Okaichi 2014-04-08
8660441 Information storage device, removable device, developer container, and image forming apparatus Kunihiro Ohyama, Masayuki Yamane, Takeshi Uchitani, Tadashi Hayakawa, Takuji Takahashi +5 more 2014-02-25
8655198 Image forming apparatus and toner cartridges with differently sized guided portions Masayuki Yamane, Kunihiro Ohyama, Takeshi Uchitani 2014-02-18
8597834 Nonaqueous electrolyte secondary battery using lithium cobalt oxide as a positive active material and a nonaqueous electrolyte containing a sulfonyl-containing compound and vinylene carbonate Koji Abe, Kazuhiro Miyoshi, Hiroyuki Fujimoto, Akira Kinoshita, Shingo Tode +2 more 2013-12-03
8576565 Electronic device cooling structure Subaru Matsumoto, Kou Komori 2013-11-05
8515296 Developer supplying device, developing device, and image forming apparatus 2013-08-20
8346105 Information storage device, removable device, developer container, and image forming apparatus Kunihiro Ohyama, Masayuki Yamane, Takeshi Uchitani, Tadashi Hayakawa, Takuji Takahashi +5 more 2013-01-01
8343662 Nonaqueous electrolyte secondary battery Shingo Tode, Akira Kinoshita, Hiroyuki Fujimoto, Ikuro Nakane, Shin Fujitani 2013-01-01
8326189 Developing device, process cartridge, and image forming apparatus Yoshiyuki Fukuda, Katsumi Masuda, Nobuyuki Taguchi, Yuuki Satoh, Keiichi Yoshida +4 more 2012-12-04
8316663 Expander-compressor unit and refrigeration cycle apparatus having the same Atsuo Okaichi, Hiroshi Hasegawa, Masaru Matsui, Fuminori Sakima 2012-11-27
8268485 Nonaqueous electrolyte secondary battery Hiroyuki Fujimoto, Akira Kinoshita, Shingo Tode, Ikuro Nakane, Shin Fujitani 2012-09-18
8253386 Method of controlling charge and discharge of non-aqueous electrolyte secondary cell Akira Kinoshita, Shingo Tode, Hiroyuki Fujimoto, Ikuro Nakane, Shin Fujitani 2012-08-28
8245531 Fluid machine and refrigeration cycle apparatus having the same Hiroshi Hasegawa 2012-08-21
8231522 Electronic endoscope system Azuchi Endo, Masaki Takamatsu, Kazuhiro Nishida, Takashi Kido, Hiroyuki Hasegawa +1 more 2012-07-31
8208840 Developer carrier, developing device, image forming apparatus, process cartridge, and image forming method 2012-06-26
8192185 Expander-compressor unit Masanobu Wada, Yu Shiotani, Shingo Oyagi, Takeshi Ogata 2012-06-05
8186179 Expander-compressor unit Hiroshi Hasegawa, Masaru Matsui, Atsuo Okaichi, Takeshi Ogata 2012-05-29
8182251 Expander-compressor unit Yu Shiotani, Takeshi Ogata, Shingo Oyagi, Masanobu Wada 2012-05-22
8177532 Expander and expander-compressor unit Atsuo Okaichi, Hiroshi Hasegawa, Masaru Matsui, Takeshi Ogata, Masanobu Wada 2012-05-15
8177525 Expander-integrated compressor Hiroshi Hasegawa, Takumi Hikichi, Takeshi Ogata 2012-05-15
8172558 Rotary expander with discharge and introduction passages for working fluid Hiroshi Hasegawa, Takeshi Ogata, Takumi Hikichi, Masanobu Wada 2012-05-08