Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5070967 | System for monitoring the operation of a cage moving in a mine shaft | Bruno Leijon, Damir Kudeljan | 1991-12-10 |
| 4761589 | Mine hoist control method and apparatus | Lindo Hauptfleisch | 1988-08-02 |