Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5800708 | Interfacial purifying apparatus using tourmaline | — | 1998-09-01 |
| 5770089 | Water treatment method using tourmaline | — | 1998-06-23 |
| 5728288 | Apparatus and method for producing air containing minus alkali ion | — | 1998-03-17 |
| 5601909 | Permanent electrode carrier using tourmaline | — | 1997-02-11 |
| 5569388 | Method of controlling the growth of microorganism in a liquid with tourmaline crystals | — | 1996-10-29 |
| 5531869 | Metal catalyst carried on carrier making use of tourmaline and its production | — | 1996-07-02 |