Issued Patents All Time
Showing 26–36 of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5236680 | Preparation of amorphous silica-alumina particles by acid-treating spherical P-type zeolite particles crystallized from a sodium aluminosilicate gel | Tadahisa Nakazawa, Masahide Ogawa, Kazuhiko Suzuki, Takashi Tokita, Toshio Ito | 1993-08-17 |
| 5143708 | Tetracosahedral siliceous particles and process for preparation thereof | Tadahisa Nakazawa, Masahide Ogawa, Kazuhiki Suzuki, Jun Suzuki | 1992-09-01 |
| 5139760 | Amorphous silica-alumina spherical particles and process for preparation thereof | Masahide Ogawa, Kazuhiko Suzuki, Hiroshi Ogawa | 1992-08-18 |
| 5049365 | Process for treating air containing hydrocarbon vapor with a composite adsorbent material | Seiji Okabayashi, Hirofumi Watanabe, Masahide Ogawa | 1991-09-17 |
| 5020169 | Elevation bed | Takeaki Hamada, Hitoshi Takei, Kenji Sato | 1991-06-04 |
| 5013709 | Pressure-sensitive recording paper and color developer therefor | Masahide Ogawa, Teiji Sato, Hisashi Tsuchida, Hiroo Inoue, Mitsuo Saito | 1991-05-07 |
| 4963519 | Composite adsorbent | Seiji Okabayashi, Hirofumi Watanabe, Masahide Ogawa | 1990-10-16 |
| 4837877 | Elevation bed | Takeaki Hamada, Akio Okada, Katsuhiro Udagawa, Fumitoshi Okazaki, Kouji Fujino | 1989-06-13 |
| 4626290 | Inorganic filler and process for production thereof | Tadahisa Nakazawa, Masahide Ogawa, Kazuhiko Suzuki | 1986-12-02 |
| 4622166 | Process for preparation of zeolite slurry excellent in static stability and dynamic stability | Tadahisa Nakazawa, Koichi Usui, Masahide Ogawa, Takashi Tokita | 1986-11-11 |
| 4228429 | Alarm system having phase-sensitive bridge circuit | Keishin Tsuchiya, Ichiro Yoshihara, Kazuhito Saito, Takeshi Abe, Kiyoshi Sone | 1980-10-14 |