Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7806618 | Frictional rotary connection | Udo Schäfer | 2010-10-05 |
| 5947626 | Frictional revolving joint | Wolfgang Miller, Udo Schäfer | 1999-09-07 |
| 4957327 | Methods of translating a face support | Heiko Druzela | 1990-09-18 |
| 4231684 | Shield type support for use in underground mining with lemniscate guide rods | Ulrich Wilde | 1980-11-04 |
| 4183701 | Coupling gear for lemniscate shield timbering frame | Peter Naundorf | 1980-01-15 |