Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5694844 | Stencil stamp assembly | — | 1997-12-09 |
| 5658692 | Carbon negative electrode materials and lithium secondary cells containing the same | Takushi Ohsaki, Ryuichi Yazaki, Akira Wakaizumi | 1997-08-19 |