Issued Patents 2002
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6499239 | Method for extracting and grading sand | Sjerp Zeldenrust | 2002-12-31 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6499239 | Method for extracting and grading sand | Sjerp Zeldenrust | 2002-12-31 |