Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4929251 | Method for producing lead accumulator with thixotropic gel | — | 1990-05-29 |
| 4414302 | Method of making a lead storage battery and lead storage battery made according to this method | Heinz Schroeder | 1983-11-08 |