Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D763333 | Welding machine | — | 2016-08-09 |
| 4381973 | Process for the preparation of pyrocatechol and hydroquinone | Christoph Jupe, Helmut Waldmann, Gunther Schummer | 1983-05-03 |
| 4362604 | Process for the preparation of pyrocatechol and hydroquinone | Christoph Jupe, Helmut Waldmann, Gunther Schummer | 1982-12-07 |
| 4308112 | Process for the isolation of pyrocatechol and hydroquinone | Christoph Jupe, Gunter Schummer | 1981-12-29 |