Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839445 | Spherical particles of thermosetting phenolic resin and process for producing the same | Yoshiaki Echigo, Kenichi Sugawara, Mutsunori Yamao, Keiichi Asami, Tuneyuki Ohsawa | 1989-06-13 |
| 4778695 | Production of microspheroidal particles of resole resins | Yoshiaki Echigo, Mutsunori Yamao, Tadashi Ishikura, Keiichi Asami, Ritsuko Shidei | 1988-10-18 |
| 4748214 | Microspherical cured phenolic resin particles and process for production thereof using emulsion stabilizers | Keiichi Asami, Yoshiaki Echigo, Mutsunori Yamao, Tadashi Ishikura, Ritsuko Shidei | 1988-05-31 |
| 4640971 | Microspherical particles of resole resins and process for producing the same | Yoshiaki Echigo, Mutsunori Yamao, Tadashi Ishikura, Keiichi Asami, Ritsuko Shidei | 1987-02-03 |