Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4567476 | Method and circuit for optical and/or acoustic indication of the charge state of a battery or a storage battery | — | 1986-01-28 |
| 4376263 | Battery charging circuit | Kurt Pittroff, Gerhard Schwarz | 1983-03-08 |