Issued Patents 2002
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6456724 | Electronic watermarking system capable of providing image data with high secrecy | — | 2002-09-24 |
| 6428236 | Expansion shaft | Kenichi Aota, Takayoshi Hashimoto, Shuuzou Hirakushi | 2002-08-06 |
| 6410656 | Cation exchangers or chelating agents and process for the preparation thereof | Hirohisa Kubota, Katsuhiko Yano, Akinori Jyo | 2002-06-25 |
| 6384267 | Process for producing hydroxyalkyl (METH) acrylates | Yasuhiro Shingai, Masatoshi Ueoka, Hirohisa Kubota | 2002-05-07 |