Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868708 | Method for voltage control of the magnets of a magnetically levitated railroad and associated control unit | — | 1989-09-19 |
| 4796724 | Process and devices for producing pressure - or shear-waves in a solid medium | Guenter Steinmetz, Ulf Steenbeck | 1989-01-10 |