| Mechanische Systeme dafür | F01-F04 |
| Systeme zum Speichern elektrischer Energie in chemischer Form | H01M |
| Herstellung von Wasserstoff durch Wasserelektrolyse | C25B 1/04 |
| Speichererhitzer | F24H 7/00 |
| Wärmespeicherung | F28D 20/00 |
| Kondensatoren | H01G |
| Belastungsausgleich in einem Netz durch Energiespeicherung | H02J 3/28 |
| Schwungräder für Dynamoelektrische Maschinen | H02K 7/02 |
| Mechanical systems therefor | F01-F04 |
| Systems for storing electric energy in chemical form | H01M |
| Hydrogen production by electrolysis of water | C25B 1/04 |
| Storage heaters | F24H 7/00 |
| Heat storage | F28D 20/00 |
| Capacitors | H01G |
| Balancing the load in a network by storage of energy | H02J 3/28 |
| Flywheels for dynamo-electric machines | H02K 7/02 |