Issued Patents All Time
Showing 26–49 of 49 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5446135 | Sulfonyloxy substituted tris-azoaryl dyes and copper complex salts thereof and polarizing films dyed therewith | Tsutami Misawa, Akira Ogiso, Rihoko Imai | 1995-08-29 |
| 5446141 | Alkylphthalocyanine near-infrared absorbers and recording/display materials using the same | Katashi Enomoto, Takahisa Oguchi, Tsutomu Nishizawa | 1995-08-29 |
| 5423100 | Water-soluble azo compounds and polarizing films using the compounds | Tsutami Misawa, Akira Ogiso, Rihoko Imai | 1995-06-13 |
| 5409634 | Near infrared absorbers and display/recording materials using the same | Katashi Enomoto, Takahisa Oguchi, Tutomu Nishizawa | 1995-04-25 |
| 5387678 | Halogenation process of phthalocyanine and halogenated alkoxyphthalocyanine | Takahisa Oguchi, Shin Aihara | 1995-02-07 |
| 5382465 | Anthraquinonic colorant and polarizing film containing the colorant | Tsutami Misawa, Tsutomu Nishizawa, Masami Nakano, Hiroyuki Katayama | 1995-01-17 |
| 5380842 | Phthalocyanine compounds and usage thereof | Akio Karasawa, Kenichi Sugimoto, Takahisa Oguchi, Shin Aihara | 1995-01-10 |
| 5358833 | Amorphous phthalocyanine compound or mixture of amorphous phthalocyanine compounds, and method for preparing same | Takahisa Oguchi, Shin Aihara, Kenichi Sugimoto | 1994-10-25 |
| 5350843 | Halogenated phthalocyanine compound, method for preparing same | Takahisa Oguchi, Shin Aihara, Kenichi Sugimoto | 1994-09-27 |
| 5334714 | Method for preparing alkoxyphthalocyanine | Takahisa Oguchi, Kenichi Sugimoto, Shin Aihara, Mansuke Matsumoto, Toshihiro Masaoka +1 more | 1994-08-02 |
| 5318856 | Water-soluble azo dyes and polarizing films using the dyes | Tsutami Misawa, Akira Ogiso, Rihoko Imai | 1994-06-07 |
| 5280114 | Halogenation of alkoxyphthalocyanine | Takahisa Oguchi, Shin Aihara | 1994-01-18 |
| 5270463 | Halogenated alkoxyphthalocyanines | Katashi Enomoto, Takahisa Oguchi, Tutomu Nishizawa | 1993-12-14 |
| 5252769 | Anthraquinonic colorant and polarizing film containing the colorant | Tsutami Misawa, Tsutomu Nishizawa, Masami Nakano, Hiroyuki Katayama | 1993-10-12 |
| 5235104 | Hydrazones and electrophotographic photoreceptors comprising them | Yasuyuki Yamada, Hiroyuki Akahori, Katashi Enomoto, Tsutomu Nishizawa, Akihiro Yamaguchi | 1993-08-10 |
| 5220010 | Method for preparation alkoxyphthalocyanine | Takahisa Oguchi, Kenichi Sugimoto, Shin Athara, Mansuke Matsumoto, Toshihiro Masaoka +1 more | 1993-06-15 |
| 5132190 | Hydrozones and electrophotographic photoreceptors comprising them | Yasuyuki Yamada, Hiroyuki Akahori, Katashi Enomoto, Tsutomu Nishizawa, Akihiro Yamaguchi | 1992-07-21 |
| 5024926 | Alkylphthalocyanine near-infrared absorbers and recording/display materials using the same | Katashi Enomoto, Takahisa Oguchi, Tsutomu Nishizawa | 1991-06-18 |
| 5023343 | P-amino substituted tetraphenylthiophenes and electrophotographic photoreceptors containing them | Eishi Tanaka, Tsutomu Nishizawa, Yasuyuki Yamada, Akihiro Yamaguchi, Masakatsu Nakatsuka | 1991-06-11 |
| 4970021 | Phthalocyanine compounds and utility thereof | Masakatsu Nakatsuka, Tsutomu Nishizawa, Takahisa Oguchi, Katashi Enomoto | 1990-11-13 |
| 4963449 | P-amino substituted tetraphenylthiophenes and electrophotographic photoreceptors containing them | Eishi Tanaka, Tsutomu Nishizawa, Yasuyuki Yamada, Akihiro Yamaguchi, Masakatsu Nakatsuka | 1990-10-16 |
| 4960538 | 1,2-naphthalocyanine near-infrared absorbent and recording/display materials using same | Takahisa Oguchi, Katashi Enomoto, Masakatsu Nakatsuka, Tsutomu Nishizawa | 1990-10-02 |
| 4808503 | Electrophotographic receptors with charge generating azo-substituted tetraphenyl-thiophene or thiophene 1,1-dioxide | Yasuyuki Yamada, Tsutomu Nishizawa, Akihiro Yamaguchi | 1989-02-28 |
| 4808507 | Electrophotographic photoreceptor 2-Phenyl-benzooxazole bisazo based | Yasuyuki Yamada, Tsutomu Nishizawa, Akihiro Yamaguchi | 1989-02-28 |