Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5174020 | Remelting process for printed circuit boards | — | 1992-12-29 |
| 4432037 | Multi-layer printed circuit board and method for determining the actual position of internally located terminal areas | — | 1984-02-14 |
| 4231692 | Drill comprised of hard metal for drilling contact holes in circuit boards and the like | Helmut Hackl | 1980-11-04 |
| 4190386 | Method of producing holes free of accretions in circuit boards made of plastic | Helmut Hackl | 1980-02-26 |