Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5449469 | Method of filtering using a double-density commercial filtering system | Sidney A. Burklund | 1995-09-12 |
| 5439601 | Method of filtering using a commercial filtering system | Sidney A. Burklund | 1995-08-08 |
| 5354455 | Double-density commercial filtering system | Sidney A. Burklund | 1994-10-11 |
| 5330638 | Commercial filtering system | Sidney A. Burklund | 1994-07-19 |