Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7451629 | Spiral pipe machine | — | 2008-11-18 |
| 7451631 | Spiral pipe machine | — | 2008-11-18 |
| 6360420 | Insulated glass window spacer and method for making window spacer | Ashok Shah, Richard Blum | 2002-03-26 |
| 6279292 | Insulated glass window spacer and method for making window spacer | Ashok Shah, Richard Blum | 2001-08-28 |
| 6038825 | Insulated glass window spacer and method for making window spacer | Ashok Shah, Rick Scott Blum | 2000-03-21 |