Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4761589 | Mine hoist control method and apparatus | Klaus Katzy | 1988-08-02 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4761589 | Mine hoist control method and apparatus | Klaus Katzy | 1988-08-02 |