Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6146695 | Internal weld protection of sheet metal pipes | — | 2000-11-14 |
| 5296078 | Weld seam cover on the inside of sheet metal tubes | — | 1994-03-22 |
| 4320423 | Apparatus for automatic repeated reproduction of sound on selected portions of magnetic tape or the like | Alois Aregger | 1982-03-16 |