Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5117673 | Process and device for determining the soot content of combustion gases | Max Pfingstl | 1992-06-02 |
| 5086655 | Orifice measuring device | George E. Fredericks | 1992-02-11 |