Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4343268 | Energy conserving exhaust passage for an internal combustion engine | John H. Stang, David A. Ruthmansdorfer | 1982-08-10 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4343268 | Energy conserving exhaust passage for an internal combustion engine | John H. Stang, David A. Ruthmansdorfer | 1982-08-10 |