Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5728293 | External filter assembly for aquariums | Giacomo Guoli | 1998-03-17 |
| D384299 | Hydrometer | Thomas A. Frakes | 1997-09-30 |
| 5484525 | Foam fractionation protein skimmer assembly | — | 1996-01-16 |
| 5011600 | Water filtration system for aquariums | Thomas A. Frakes, Larry M. Pettengill | 1991-04-30 |
| 4985181 | Centrifugal pump especially for aquariums | Antonio Strada, Alain Bertschy, Giacomo Guoli | 1991-01-15 |
| D308833 | Comparator for chemical testing of water | — | 1990-06-26 |