Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6416862 | Ultrafine particulate zinc oxide and production process thereof | Hisao Kogoi, Jun Tanaka | 2002-07-09 |
| 6335002 | Ultrafine particulate zinc oxide, production thereof and cosmetic material using the same | Hisao Kogoi, Jun Tanaka | 2002-01-01 |