Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4818575 | Biaxially drawn polyester vessel having resistance to heat distortion and gas barrier properties and process for preparation thereof | Shunsaku Hirata, Sadao Hirata | 1989-04-04 |
| 4816304 | Multi-layer gas-barrier drawn polyester vessel | Sadao Hirata, Takeshi Sugimoto, Yoshimichi Ohkubo | 1989-03-28 |
| 4798697 | Process for preparation of injection molded body of olefin/vinyl alcohol copolymer | Sadao Hirata, Junichi Matsuo, Masami Hirano, Isao Tanikawa | 1989-01-17 |