Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867671 | Apparatus for manufacturing resin tube | Akio Nagayoshi | 1989-09-19 |
| 4824502 | Method and apparatus for manufacturing a plastic pipe | Akio Nagayoshi | 1989-04-25 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867671 | Apparatus for manufacturing resin tube | Akio Nagayoshi | 1989-09-19 |
| 4824502 | Method and apparatus for manufacturing a plastic pipe | Akio Nagayoshi | 1989-04-25 |