Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5290157 | Clamp for attaching an aquarium power head | Allan H. Willinger, Robert Ellis, Mark Agresta | 1994-03-01 |
| 5282727 | Aquarium power head with integral muffler | Allan H. Willinger, Robert Ellis, Mark Agresta | 1994-02-01 |
| 5282961 | Floating impeller assembly | Robert Ellis, Allan H. Willinger, Jonas Ivasauskas | 1994-02-01 |