Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7678324 | Method for forming a hollow plastic product | Tatsuya Nakagawa | 2010-03-16 |
| 7316427 | Hollow plastic product having a connector pipe | Tatsuya Nakagawa | 2008-01-08 |
| 6537484 | Method for manufacturing a multi-layer plastic pipe | Tatsuya Nakagawa | 2003-03-25 |
| 6319454 | Method and apparatus for manufacturing a hollow plastic product | Tatsuya Nakagawa | 2001-11-20 |
| 6251332 | Method for manufacturing a multilayer plastic pipe | Tatsuya Nakagawa | 2001-06-26 |
| 6119731 | Hollow plastic product | Tatsuya Nakagawa | 2000-09-19 |
| 5851456 | Method for manufacturing a multi-layer plastic product | Tatsuhiko Mukawa, Tatsuya Nakagawa | 1998-12-22 |
| 5699835 | Multi-layer plastic hollow pipe | Tatsuya Nakagawa | 1997-12-23 |
| 5653265 | Hollow plastic product | Tatsuya Nakagawa | 1997-08-05 |
| 5198174 | Method for producing a hollow plastic product having a radially extending portion | Tatsuya Nakagawa | 1993-03-30 |
| 4907957 | Molding apparatus for forming a parison and product of differing materials | Tatsuya Nakagawa | 1990-03-13 |
| 4659531 | Method and apparatus for manufacturing a hollow plastic product | — | 1987-04-21 |