Issued Patents 1989
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886641 | Electrical contact spring material made of copper base alloy of high strength and toughness with reduced anisotropy in characteristics | Takuro Iwamura | 1989-12-12 |
| 4874890 | Process for the production of deuterated methyl acrylate or deuterated methyl methacrylate | Masaaki Kato, Tetsuya Uno, Naoto Osuga | 1989-10-17 |
| 4873391 | Process for producing isobutylene | Kazutaka Inoue, Toshihiro Sato | 1989-10-10 |
| 4872048 | Semiconductor device having copper alloy leads | Hidetoshi Akutsu, Takuro Iwamura | 1989-10-03 |
| 4854842 | Production apparatus to form the solid state food material completely wrapped and sealed with the clayish state food material into globular shape | — | 1989-08-08 |
| 4830086 | Mold member and rapidly solidifying water cooled rotary roll member | Takuro Iwamura, Kazuhiko Tabei | 1989-05-16 |
| 4824998 | Process for producing tau-butyl methacrylate | Kazutaka Inoue, Toshihiro Sato | 1989-04-25 |
| 4816603 | Process for the production of methacrolein and methacrylic acid | Motomu Oh-Kita, Yoshiyuki Taniguchi, Masaaki Kato | 1989-03-28 |
| 4803302 | Process for the production of methacrylic acid | Motomu Oh-Kita, Masaaki Kato | 1989-02-07 |