Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5339513 | Method of manufacturing thick-walled small diameter pipe | Yasuaki Hashimoto | 1994-08-23 |
| 5315904 | Apparatus for cutting inner circumferential surface of thick walled small diameter pipe | Yasuaki Hashimoto, Akio Nakane | 1994-05-31 |