Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4640745 | Process for producing a cutting base | Klaus Roschmann | 1987-02-03 |
| 4515843 | Disc-shaped information carrier having a high storage density | Heinz Borchard, Bruno Rybka | 1985-05-07 |
| 4512007 | Method for producing a record carrier | Klaus Roschmann | 1985-04-16 |
| 4248438 | Mechanical record cutting method | Horst Redlich, Klaus Roschmann | 1981-02-03 |