Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881133 | Arrangement for the recording of an information signal | Gunter Joschko | 1989-11-14 |
| 4821250 | Process and apparatus for the recording of an information signal | Guenter Joschko | 1989-04-11 |
| 4814047 | Method for producing a prerecorded disk-shaped die | Gunter Joschko | 1989-03-21 |
| 4748612 | Arrangement for cutting information into a record carrier made of metal, particulary copper | — | 1988-05-31 |
| 4538256 | Method and apparatus for cutting information into a record carrier | — | 1985-08-27 |
| 4531207 | Record cutting stylus assembly | Heinz Stahlbaum | 1985-07-23 |
| 4525827 | Apparatus for removing a cut chip by suction | — | 1985-06-25 |
| 4484320 | Apparatus and method for cutting information into a metallic record carrier | — | 1984-11-20 |
| 4351047 | Centering of a disc-shaped record carrier on a turntable | Heinz Borchard, Rainer Ihlenburg | 1982-09-21 |
| 4322841 | Playback instrument for an information carrier disc | Heinz Borchard | 1982-03-30 |
| 4248438 | Mechanical record cutting method | Herbert Knothe, Klaus Roschmann | 1981-02-03 |
| 4223242 | Method and circuit for driving a piezoelectric transducer | Werther Hartmann, Gerhard Dickopp | 1980-09-16 |
| 4194094 | Device for mechanically recording a signal having a bandwidth of several MHz, particularly for a video disc | — | 1980-03-18 |