Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6749932 | Colorants, colored articles and methods of making them | — | 2004-06-15 |
| 6224799 | Method for new additive concentrates | — | 2001-05-01 |
| 5010020 | Quick color test to detect lead release from glaze and enamel coatings | — | 1991-04-23 |
| 4873197 | Quick color test to detect lead release from glazed ceramic and enameled metal ware | — | 1989-10-10 |