Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7674551 | State of charge indicator for a battery | — | 2010-03-09 |
| 7612535 | Charge indicator | — | 2009-11-03 |
| 7144657 | Electrical rechargeable battery | Christian Rosenkranz, Gerolf Richter | 2006-12-05 |
| 6733921 | Rechargeable electric battery | Gerolf Richter, Oliver Bosch | 2004-05-11 |
| 6646416 | Electrical rechargeable battery | Peter Schellenberg | 2003-11-11 |
| 6228537 | Electrode grid for lead batteries | Gerolf Richter, Joachim Illmann | 2001-05-08 |