Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5714062 | Diffuser conduit joint | William W. Winkler | 1998-02-03 |
| 4288394 | Sewage aeration system | Lloyd Ewing, David T. Redmon, Paul M. Thayer, Frank L. Schmit | 1981-09-08 |
| 4288395 | Diffusion element with boundary zone treatment | Lloyd Ewing, David T. Redmon | 1981-09-08 |
| 4261932 | Diffusion element with boundary zone treatment | Lloyd Ewing, David T. Redmon | 1981-04-14 |