Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4890095 | Circuit arrangement for automatically monitoring several analog electric signals | Wolfgang Esser | 1989-12-26 |
| 4878009 | Voltage source having preset values for source voltage and internal resistance | Wolfgang Esser | 1989-10-31 |