Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5437435 | Gas purging device | Lorenz Dotsch, Karl-Heinz Hofer | 1995-08-01 |
| 5225247 | Process for producing a gas purging plug with increased resistance to infiltration and oriented porosity | Lorenz Dotsch, Frich Renfordt, Jean-Louis Retrayt | 1993-07-06 |