Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6619324 | Non-return bias valve mechanism for a fluid pumping assembly | Nagamasa Yamada | 2003-09-16 |
| 5793017 | Apparatus for automatically welding tubular components of fusible resin and pipe clamping apparatus and heating apparatus used for the same | Nagamasa Yamada | 1998-08-11 |