Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5934128 | Heat transfer tube having grooved inner surface | Seizo Masukawa, Haruo Kohno, Shunroku Sukumoda | 1999-08-10 |
| 5791405 | Heat transfer tube having grooved inner surface | Seizo Masukawa, Haruo Kohno, Shunroku Sukumoda | 1998-08-11 |