Issued Patents All Time
Showing 26–38 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6319403 | Effluent filter for septic tanks and other on-site waste disposal systems | — | 2001-11-20 |
| D431629 | Effluent filter | — | 2000-10-03 |
| 5852901 | Stackable riser for on-site waste and drainage systems | — | 1998-12-29 |
| 5711536 | Seal component for use in on-site poured concrete or plastic tank or box components of fluid distribution systems | — | 1998-01-27 |
| 5624123 | Pipe seal assembly for poured concrete on-site waste disposal system components | — | 1997-04-29 |
| 5617679 | Stackable riser for on-site waste and drainage systems | — | 1997-04-08 |
| 5529436 | Trench drain system | — | 1996-06-25 |
| 5370426 | Pipe connector for connecting to a hard plastic pipe | — | 1994-12-06 |
| 5336351 | Method for connecting a pipe connector to a hard plastic pipe | — | 1994-08-09 |
| 5335945 | Flexible pipe connector | — | 1994-08-09 |
| 4959145 | Gas baffle device for on-site waste disposal systems | — | 1990-09-25 |
| 4951914 | Pipe seal assembly for poured concrete on-site waste disposal system components | Steven R. Shelton | 1990-08-28 |
| 4663036 | Septic system drop box with seal apparatus therefor | Frederick P. Strobl, Jr. | 1987-05-05 |