Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5379708 | Method and device for forming three-dimensional envelopes | Philipp Moll | 1995-01-10 |
| 5283045 | Sinterable carbon powder and method of its production | Winfried Boenigk, Andreas Niehoff, Hans Spengler | 1994-02-01 |
| 5262043 | Coal tar pitch and the preparation and use thereof | Winfried Boenigk, Hans Spengler | 1993-11-16 |