Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6371307 | Envelope style filter paper | — | 2002-04-16 |
| 5458772 | Adjustable filter holder assembly | Richard A. Bernard, Sidney A. Burklund | 1995-10-17 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6371307 | Envelope style filter paper | — | 2002-04-16 |
| 5458772 | Adjustable filter holder assembly | Richard A. Bernard, Sidney A. Burklund | 1995-10-17 |