Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5288923 | Preparation of ethers of diphenols | Gerhard Fennhoff, Manfred Ehlert | 1994-02-22 |
| 4238351 | Polyarylamide, their production and their use as absorbers for ultraviolet rays | Franz Alfes, Karl-Heinrich Meyer, Ludwig Bottenbruch | 1980-12-09 |