Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4843246 | Apparatus for detecting the position of incidence of a beam of charge carriers on a target | Ewald Benes, Franz Viehbock, Herbert Stori, Gernot Thorn | 1989-06-27 |
| 4832496 | Method and apparatus for measuring the monocrystal diameter and the melt level during crucible drawing in the Czochralski process | — | 1989-05-23 |
| 4823263 | Apparatus for controlling the operation of tipping a melting crucible | Jurgen Bruch | 1989-04-18 |
| 4797897 | Apparatus for controlling the distance of a melting electrode from the surface of the melted material in a vacuum arc furnace | Otto W. Stenzel | 1989-01-10 |