Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5853591 | Rotating biological aquarium filter system | Wilfred Philip Snyder, Joseph Scott Bussing | 1998-12-29 |
| 5679253 | Rotating biological aquarium filter system | Roy S. Hickok | 1997-10-21 |
| 5618419 | Filter cartridge with back structure defining a weir | — | 1997-04-08 |
| 5423978 | Rotating biologic aquarium filter system | Wilfred Philip Snyder, Joseph Scott Bussing | 1995-06-13 |
| 5419831 | Rotating biological aquarium filter system | Roy S. Hickok | 1995-05-30 |
| 5401401 | Hang on tank canister filter | Roy S. Hickok | 1995-03-28 |
| 5002660 | Compact aquarium filter | Robert M. Sherman, Robert F. Reinoehl, Leonard Pitts, John M. Fisher | 1991-03-26 |
| 4601821 | Freestanding aquarium filter | Robert M. Sherman | 1986-07-22 |
| D262153 | Bird cage | — | 1981-12-01 |