Issued Patents All Time
Showing 1–25 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7071285 | Aromatic polycarbonate resin, electrophotographic photoconductor, process cartridge, and electrophotographic image forming method and apparatus | Shinichi Kawamura, Masaomi Sasaki, Kazukiyo Nagai, Kohkoku Ri, Katsuhiro Morooka | 2006-07-04 |
| 6919419 | AROMATIC BLOCK POLYCARBONATE RESIN, DIPHENOL COMPOUND FOR PREPARATION OF THE POLYCARBONATE RESIN, ELECTRO-PHOTOGRAPHIC PHOTOCONDUCTOR, ELECTRO-PHOTOGRAPHIC IMAGE FORMING APPARATUS AND PROCESS, AND PROCESS CARTRIDGE | Kohkoku Ri, Masaomi Sasaki, Kazukiyo Nagai, Shinichi Kawamura, Katsuhiro Morooka | 2005-07-19 |
| 6858161 | Method for purifying electronic item material | Katsumi Abe, Tomonori Nishimura, Takanobu Watanabe | 2005-02-22 |
| 6790571 | Aromatic polycarbonate resin, electrophotographic photoconductor, process cartridge, and electrophotographic image forming method and apparatus | Shinichi Kawamura, Masaomi Sasaki, Kazukiyo Nagai, Kohkoku Ri, Katsuhiro Morooka | 2004-09-14 |
| 6664361 | Diphenol compound, aromatic polycarbonate and electrophotoconductive photoconductor | Masaomi Sasaki, Shinichi Kawamura, Kazukiyo Nagai, Kohkoku Ri, Katsuhiro Morooka | 2003-12-16 |
| 6576386 | AROMATIC BLOCK POLYCARBONATE RESIN, DIPHENOL COMPOUND FOR PREPARATION OF THE POLYCARBONATE RESIN, ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR, ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS AND PROCESS, AND PROCESS CARTRIDGE | Kohkoku Ri, Masaomi Sasaki, Kazukiyo Nagai, Shinichi Kawamura, Katsuhiro Morooka | 2003-06-10 |
| 6486293 | Electrophotographic photoconductor and method of producing aromatic polycarbonate resin for use in the photoconductor | Kohkoku Ri, Masaomi Sasaki, Kazukiyo Nagai, Shinichi Kawamura, Katsuhiro Morooka | 2002-11-26 |
| 6303736 | Electrophotographic photoconductor and aromatic polycarbonate resin for use in the photoconductor | Shinichi Kawamura, Masaomi Sasaki, Kazukiyo Nagai, Chiaki Tanaka, Kohkoku Ri +1 more | 2001-10-16 |
| 6194535 | Electrophotographic photoconductor and aromatic polycarbonate resin for use therein | Akira Katayama, Masaomi Sasaki, Katsukiyo Nagai, Chiaki Tanaka, Shinichi Kawamura +2 more | 2001-02-27 |
| 6187494 | Electrophotographic photoconductor and aromatic polycarbonate resin for use in the photoconductor | Shinichi Kawamura, Masaomi Sasaki, Kazukiyo Nagai, Chiaki Tanaka, Kohkoku Ri +1 more | 2001-02-13 |
| 6187492 | Electrophotographic photoconductor and method of producing aromatic polycarbonate resin for use in the photoconductor | Kohkoku Ri, Masaomi Sasaki, Kazukiyo Nagai, Shinichi Kawamura, Katsuhiro Morooka | 2001-02-13 |
| 6172176 | Electrophotographic photoconductor and aromatic polycarbonate resin for use therein | Chiaki Tanaka, Masaomi Sasaki, Katsukiyo Nagai, Shinichi Kawamura, Katsuhiro Morooka | 2001-01-09 |
| 6130310 | Electrophotographic photoconductor and aromatic polycarbonate resin for use therein | Akira Katayama, Masaomi Sasaki, Katsukiyo Nagai, Chiaki Tanaka, Shinichi Kawamura +1 more | 2000-10-10 |
| 6066428 | Electrophotographic photoconductor and aromatic polycarbonate resin for use therein | Akira Katayama, Masaomi Sasaki, Katsukiyo Nagai, Chiaki Tanaka, Shinichi Kawamura +2 more | 2000-05-23 |
| 6045959 | Electrophotographic photoconductor and aromatic polycarbonate resin for use therein | Akira Katayama, Masaomi Sasaki, Katsukiyo Nagai, Chiaki Tanaka, Shinichi Kawamura +1 more | 2000-04-04 |
| 5976746 | Electrophotographic photoconductor and aromatic polycarbonate resin for use therein | Chiaki Tanaka, Masaomi Sasaki, Katsukiyo Nagai, Shinichi Kawamura, Katsuhiro Morooka | 1999-11-02 |
| 5260156 | 1,3-pentadiene derivatives and electrophotographic photoconductor using the same | Mitsuru Hashimoto, Masaomi Sasaki, Tomoyuki Shimada, Nobuo Suzuki, Takayuki Sakai | 1993-11-09 |
| 5252750 | Polyolefin amino derivatives | Mitsuru Hashimoto, Tomoyuki Shimada, Nobuo Suzuki, Takayuki Sakai, Masaomi Sasaki | 1993-10-12 |
| 5166438 | 1,3-pentadiene derivatives and electrophotographic photoconductor using the same | Mitsuru Hashimoto, Masaomi Sasaki, Tomoyuki Shimada, Nobuo Suzuki, Takayuki Sakai | 1992-11-24 |
| 5068350 | Polyolefin derivatives | Mitsuru Hashimoto, Tomoyuki Shimada, Nobuo Suzuki, Takayuki Sakai, Masaomi Sasaki | 1991-11-26 |
| 4965157 | Electrophotographic photoconductor and polyolefin derivatives employed in the same photoconductor | Mitsuru Hashimoto, Tomoyuki Shimada, Nobuo Suzuki, Takayuki Sakai, Masaomi Sasaki | 1990-10-23 |
| 4908225 | Use of a resin powder composition for electrostatic coating | Isao Niimura, Hideo Nagasaka, Manabu Takeuchi, Toshiyuki Nita | 1990-03-13 |
| 4780553 | Electrophotographic toner and compounds useful for the toner | Nobuo Suzuki, Kikuko Okamura, Genpei Sugiyama | 1988-10-25 |
| 4694088 | Fluoran compounds | Kazuo Kaneko, Michihiro Gonda, Mikiko Kanasugi | 1987-09-15 |
| 4683188 | Electrophotographic toner containing metal complex charge control agent | Nobuo Suzuki, Kikuko Okamura, Genpei Sugiyama | 1987-07-28 |