Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4392230 | Method and apparatus for the manufacture of silicon by crucible-free zone melting | Hans-Christian Grassmann, Karl Simon Schmidt | 1983-07-05 |
| 4361716 | Current lead-in of the coaxial type for sealing to a container wall | — | 1982-11-30 |
| 4353874 | Rotary tube reactor for the thermal treatment of material | Wolfgang Weiss | 1982-10-12 |
| 4331827 | Method of producing current lead-ins having coaxial construction | — | 1982-05-25 |
| RE30863 | Method for crucible-free zone meeting of semiconductor crystal rods | — | 1982-02-09 |
| 4260372 | Rotary tube | — | 1981-04-07 |