Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4474726 | Method of producing a channeled plastic pipe with closed channel ends | Ryozo Ohta, Takehiro Itoh, Jun Yoshikawa | 1984-10-02 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4474726 | Method of producing a channeled plastic pipe with closed channel ends | Ryozo Ohta, Takehiro Itoh, Jun Yoshikawa | 1984-10-02 |