Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6579456 | Method and device for precipitating beverage sediment | Rolf Frey, Frank Göltenboth, Martin Grupp, Gunther Nagel, Armin Startz | 2003-06-17 |
| 4694737 | Coffee percolator | — | 1987-09-22 |
| 4583449 | Coffee percolator for selectively making normal coffee or espresso | Artur Dangel, Josef Frech, Willi Niess, Rolf Prillipp, deceased, Hermann Riegert +1 more | 1986-04-22 |