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 101–115 of 115 patents

Patent #TitleCo-InventorsDate
4592644 Copying machine using a photosensitive belt 1986-06-03
4571057 Transfer medium separation in a recording apparatus Eiichi Akutsu 1986-02-18
4539569 Ink jet recording apparatus Takashi Watanabe, Masakazu Ozawa, Haruyuki Matsumoto 1985-09-03
4505577 Toner powder collection device 1985-03-19
4487501 Process of exposing photosensitive member Shigeru Suzuki, Nobuyuki Yanagawa, Koji Hirakura, Chikara Imai 1984-12-11
4348098 Electrophotographic apparatus 1982-09-07
4338386 Multiple reproduction process and apparatus involves toned electrophotographic image transfer 1982-07-06
4333063 Amplitude equalizer Toshihiko Ryu 1982-06-01
4319832 Toner separation and recovery apparatus Koji Sakamoto, Masayuki Hayashi, Misao Tanzawa 1982-03-16
4272180 Electrostatic copying machine Toyokazu Satomi, Isao Nakamura, Yasuhiro Tabata, Tamaki Kaneko 1981-06-09
4264067 Duplexing auto document feed for copying machine Gerald M. Adams, Takao Suzuki 1981-04-28
4231561 Auto document feeder for use with duplex copying machine Tamaki Kaneko, Seiichi Miyakawa, Toyokazu Satomi, Isao Nakamura, Yasuhiro Tabata 1980-11-04
4218128 Duplex copying machine Toyokazu Satomi, Isao Nakamura, Yasuhiro Tabata, Tamaki Kaneko 1980-08-19
4218130 Method for controlling a copying apparatus adapted to print images on opposite surfaces of a copy sheet Toyokazu Satomi, Seiichi Miyakawa, Isao Nakamura, Yasuhiro Tabata, Tamaki Kaneko 1980-08-19
4187024 Electrostatic copying machine Toyokazu Satomi, Isao Nakamura, Yasuhiro Tabata, Tamaki Kaneko 1980-02-05