Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7387493 | Impeller with widened blades | Donald W. Johnson | 2008-06-17 |
| 7121806 | Welding method and an assembly formed thereby | Donald W. Johnson | 2006-10-17 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7387493 | Impeller with widened blades | Donald W. Johnson | 2008-06-17 |
| 7121806 | Welding method and an assembly formed thereby | Donald W. Johnson | 2006-10-17 |