Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5904931 | Transdermal therapeutic systems that contain sex steroids and dimethyl isosorbide | Ralph Lipp, Clemens Gunther, Jutta Riedl | 1999-05-18 |
| 5858394 | Agent for transdermal administration that contains gestodene esters | Ralph Lipp, Henry Laurent, Clemens Gunther, Jutta Riedl, Peter Esperling | 1999-01-12 |