Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6459004 | Cleavage method of bisphenols | Kouichirou Terada, Kiyoshi Mizuma, Mikio Shibasaki | 2002-10-01 |
| 6127511 | Preparation process of phenol aralkyl resins | Tomoyuki Kawabata, Teruo Yuasa, Yukio Fukui | 2000-10-03 |
| 6068920 | Random-block copolymer and monofilament thereof | Akihiro Funae, Kouichi Uchiki, Hideyuki Akieda | 2000-05-30 |
| 5883741 | Optical head device and birefringent diffraction grating polarizer and polarizing hologram element used therein | Akitomo Oba | 1999-03-16 |
| 5780104 | Method for preventing the inner wall surfaces of the polymerization apparatus from being fouled with scale during the polymerizatioin of vinyl chloride | Akihiko Takahashi, Sunao Maeda, Masaaki Ozawa, Ichisaburo Nakamura | 1998-07-14 |
| 5659531 | Optical head device and birefringent diffraction grating polarizer and polarizing hologram element used therein | Akitomo Oba | 1997-08-19 |
| 5636049 | Mechanism for scanning the inner periphery of a drum included in an image forming apparatus | Seiji Kawata | 1997-06-03 |
| 5535055 | Optical head device and birefringent diffraction grating polarizer and polarizing hologram element used therein | Akitomo Oba | 1996-07-09 |
| 5493555 | Optical head using birefringent diffraction grating | Yasuo Kimura | 1996-02-20 |
| 5446290 | Fingerprint image input device having an image sensor with openings | Ichiro Fujieda, Seijin Sugama | 1995-08-29 |
| 5336875 | Method and arrangement of generating a non-diffractive beam at a location which is remote from optical element and application thereof | Kazuhisa Shirakabe | 1994-08-09 |
| 5270996 | Optical head with diffraction grating producing five diffracted detection light beams | — | 1993-12-14 |
| 5267083 | Lens system for optical reader | Hiroyuki Miyazaki | 1993-11-30 |
| 5215671 | Purification method of 2-chloropropionic acid | Thutomu Kajikuri, Shoji Kitado, Kenji Senoo | 1993-06-01 |
| 5036504 | Optical head using a reflection grating | Akitomo Ohba, Yasuo Kimura | 1991-07-30 |
| 4945529 | Optical head comprising a diffraction grating for directing two or more diffracted beams to optical detectors | Yutaka Yamanaka, Yasuo Kimura | 1990-07-31 |
| 4842824 | Optical storage medium | — | 1989-06-27 |
| 4753502 | Holographic laser beam scanner | — | 1988-06-28 |
| 4732654 | Preparation process of indole | Atsuyoshi Yamauchi, Seiya Iguchi, Hiroshi Kimura, Satoshi Morita | 1988-03-22 |
| 4727161 | Process for the preparation of indoles | Atsuyoshi Yamauchi, Seiya Iguchi, Hiroshii Kimura, Satoshi Morita | 1988-02-23 |
| 4689481 | Focus error detector and optical head using the same | — | 1987-08-25 |
| 4378142 | Hologram made by using a plurality of spherical waves and a device for laser beam scanning by using the hologram | — | 1983-03-29 |
| 4299437 | Coherent beam scanner having a planar hologram illuminated by a convergent or divergent beam | — | 1981-11-10 |