Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9217450 | Key and keyway connectors | John Hamish Alexander Pettigrew, Thomas David Percy | 2015-12-22 |
| 9051946 | Connecting mechanism | Thomas David Percy, John Hamish Alexander Pettigrew | 2015-06-09 |
| 9016730 | Connecting mechanism | John Hamish Alexander Pettigrew, Thomas David Percy | 2015-04-28 |
| 7708887 | Combination membrane/biolytic filtration | Warren Thomas Johnson, Bruce Gregory Biltoft | 2010-05-04 |
| 6890439 | Biolytic filtration | — | 2005-05-10 |
| 5976374 | Self-cleansing filter | — | 1999-11-02 |
| 5919366 | Effluent treatment system | — | 1999-07-06 |
| 5633163 | Method for treating wastewater and solid organic waste | — | 1997-05-27 |