Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6016839 | Air diffuser valve | Spiros G. Raftis, Michael J. Duer, Chris Mitchell | 2000-01-25 |
| 5931197 | Asymmetrical check valve | Spiros G. Raftis, Michael J. Duer | 1999-08-03 |
| 5769125 | Inversion-resistant, readily openable tide gate valve | Michael J. Duer, Spiros G. Raftis | 1998-06-23 |