Issued Patents All Time
Showing 25 most recent of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D355701 | Aquarium filter | Sean H. Simmons | 1995-02-21 |
| D353715 | Aquarium tube cleaning brush | — | 1994-12-27 |
| D353649 | Aquarium filter bag | Jonas Ivasauskas | 1994-12-20 |
| 5290157 | Clamp for attaching an aquarium power head | Robert Ellis, Gene Fleischer, Mark Agresta | 1994-03-01 |
| 5282727 | Aquarium power head with integral muffler | Robert Ellis, Gene Fleischer, Mark Agresta | 1994-02-01 |
| 5282961 | Floating impeller assembly | Robert Ellis, Jonas Ivasauskas, Gene Fleischer | 1994-02-01 |
| 5238367 | Impeller assembly for aquarium power filter | Robert Ellis | 1993-08-24 |
| D338018 | Air pump | Jonathan Willinger | 1993-08-03 |
| 5228986 | Aquarium power filter | Robert Ellis | 1993-07-20 |
| 5176824 | Aerobic aquarium filter chamber | Klaus Woltman, Jonathan Willinger | 1993-01-05 |
| 5137433 | Aquarium power head with integral muffler | Robert Ellis | 1992-08-11 |
| 5098585 | Aquarium filter assembly | Klaus Woltman | 1992-03-24 |
| 5052904 | Aquarium air pump | Tsuyoshi Itakura | 1991-10-01 |
| 5053125 | Filter cartridge | Klaus Woltmann | 1991-10-01 |
| 5034165 | Air stone | Chen-Chiao Wang | 1991-07-23 |
| D317966 | Aquarium filter | — | 1991-07-02 |
| 4997559 | Aquarium filter assembly with restricted pumping window | Robert Ellis | 1991-03-05 |
| D307626 | Aquarium filter cartridge | — | 1990-05-01 |
| 4907772 | Universal clamp for aquarium tank | — | 1990-03-13 |
| 4895646 | External aquarium filter | — | 1990-01-23 |
| 4886093 | Vent valve of an air pump | Tsuyoshi Itakura | 1989-12-12 |
| 4880549 | Method of filtering in an aquarium tank with a filter envelope | Klaus Woltmann | 1989-11-14 |
| 4861468 | Rotor impeller assembly | Jonas Ivasauskas | 1989-08-29 |
| 4842727 | Aquarium filter | Klaus Woltmann | 1989-06-27 |
| 4842726 | Inside filter for aquariums | — | 1989-06-27 |