Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880212 | Device for detecting the level of the slag in a metal pool | Hans Hagglund, Lars Ericsson | 1989-11-14 |
| 4837717 | Device for measuring substantially vertical, circular-cylindrical objects | Lars Ericsson | 1989-06-06 |