Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5967149 | Tobacco filter material and a method of producing the same | Syu Shimamoto | 1999-10-19 |
| 5947127 | Tobacco filters and method of producing the same | Hiroki Taniguchi, Nobuyuki Oji, Kanae Nishimura | 1999-09-07 |
| 5711322 | Tobacco filter material and a method of producing the same | Syu Shimamoto | 1998-01-27 |
| 5706833 | Tobacco filters and method of producing the same | Hiroki Taniguchi, Nobuyuki Oji, Kanae Nishimura | 1998-01-13 |
| 5707522 | Permselective membrane of polyacrylonitrile copolymer and process for producing the same | Yasushi Maeda, Kengo Magara | 1998-01-13 |
| 5554292 | Permselective membrane of polyacrylonitrile copolymer and process for producing the same | Yasushi Maeda, Kengo Magara | 1996-09-10 |
| 5393432 | Separating membrane of polyion complex | Michio Tsuyumoto, Masahiko Sugimoto, Yasushi Maeda | 1995-02-28 |
| 4292417 | Semipermeable membrane | Kiyoshi Ishii, Ryoshu Suzuki, Zenjiro Honda | 1981-09-29 |
| 4279846 | Process for preparing semipermeable membrane having selective permeability | Kiyoshi Ishii, Zenjiro Honda | 1981-07-21 |
| 4200726 | Semipermeable membrane of phenoxy resin containing sulfuric acid groups or salts thereof | Kiyoshi Ishii, Ryoshu Suzuki, Zenjiro Honda | 1980-04-29 |