MY

Masao Yoshikawa

Ricoh Company: 17 patents #1,283 of 9,818Top 15%
Canon: 10 patents #6,241 of 19,416Top 35%
Sumitomo Electric Industries: 8 patents #3,473 of 21,551Top 20%
PA Panasonic: 6 patents #4,438 of 21,108Top 25%
SC Shin-Etsu Chemical Co.: 6 patents #590 of 2,176Top 30%
MI Mitsui Toatsu Chemicals, Incorporated: 4 patents #343 of 1,543Top 25%
Fujitsu Limited: 3 patents #8,614 of 24,456Top 40%
NC Ntn-Rulon Industries Company: 2 patents #3 of 9Top 35%
Sharp Kabushiki Kaisha: 2 patents #5,184 of 10,731Top 50%
TO Tomey: 1 patents #22 of 51Top 45%
UN Unknown: 1 patents #29,356 of 83,584Top 40%
Overall (All Time): #40,618 of 4,157,543Top 1%
59
Patents All Time

Issued Patents All Time

Showing 51–59 of 59 patents

Patent #TitleCo-InventorsDate
4774543 Image forming apparatus with plural developing devices Tatuya Kobayashi 1988-09-27
4748213 All-aromatic polyester resin composition 1988-05-31
D291441 Television receiver Hiroaki Nishiyori, Nobuo Momota, Akishige Sai, Kazutoshi Masunari 1987-08-18
4672149 Photoelectric transducer element Akio Kojima, Tetsuro Suzuki, Masaomi Sasaki 1987-06-09
4606990 Method for forming a thin layer of developer 1986-08-19
4548489 Device for forming a thin layer of developer 1985-10-22
4504136 Magnetic developing device with offset magnetic pole Fumitaka Kan, Hiroshi Satomura 1985-03-12
4413899 Copying method and apparatus Shuichi Karasawa, Fuyuhiko Matsumoto, Shuichi Tsushima, Masatoshi Saitou, Tsutomu Ishida +2 more 1983-11-08
4329416 Methods for preparing plural layer organic electrophotographic elements Kiyoshi Tanikawa, Tsutomu Sato 1982-05-11