Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5036585 | Process for the manufacture of an exhaust silencer | — | 1991-08-06 |
| 4269800 | Process for the preparation of a composite mat consisting of a layer of mineral wool and a layer of steel wool | Rolf-Dieter Sommer, Heinz-Jurgen Ungerer | 1981-05-26 |