Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5667658 | Master for the duplication of sound recordings and process for its production | Hermann Koop, Wolf-Eckhart Fritsche | 1997-09-16 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5667658 | Master for the duplication of sound recordings and process for its production | Hermann Koop, Wolf-Eckhart Fritsche | 1997-09-16 |