Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5645629 | Calcined pencil leads and method of manufacturing the same | Kazutaka Aoki | 1997-07-08 |
| 5595700 | Non-baked color pencil leads and method for preparing same | — | 1997-01-21 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5645629 | Calcined pencil leads and method of manufacturing the same | Kazutaka Aoki | 1997-07-08 |
| 5595700 | Non-baked color pencil leads and method for preparing same | — | 1997-01-21 |