ENERGY DEVELOPMENT LLC
67Patents
2Active
67Granted
38Portfolio score
Filing activity: Nov 18, 1971 → Jun 26, 2013 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4405891A | Control system for electric powered vehicle | Emerging Cross-Sectional Technologies | 110 | Expired |
| US4415847A | Method and apparatus for supplying cooling liquid to a storage battery | Emerging Cross-Sectional Technologies | 63 | Expired |
| US4382113A | Method for joining graphite to graphite | Emerging Cross-Sectional Technologies | 49 | Expired |
| US7808121B1 | Vehicle with electricity generating, braking wind turbine | Emerging Cross-Sectional Technologies | 48 | Active |
| US4518663A | Electrolyte circulation subsystem | Emerging Cross-Sectional Technologies | 47 | Expired |
| US4502000A | Device for balancing parallel strings | Emerging Cross-Sectional Technologies | 46 | Expired |
| US4212598A | Traffic-operated air-powered generating system | Mechanical Engineering; Lighting; Heating | 45 | Expired |
| US3993502A | Metal halogen hydrate battery system | Emerging Cross-Sectional Technologies | 41 | Expired |
| US4343982A | Method of joining metal to graphite by spot welding | Emerging Cross-Sectional Technologies | 40 | Expired |
| US4100332A | Comb type bipolar electrode elements and battery stacks thereof | Emerging Cross-Sectional Technologies | 38 | Expired |
| US4127701A | Refuelable electrical energy storage device | Emerging Cross-Sectional Technologies | 37 | Expired |
| US4146680A | Operational zinc chlorine battery based on a water store | Emerging Cross-Sectional Technologies | 34 | Expired |
| US4086393A | Gas phase free liquid chlorine electrochemical systems | Emerging Cross-Sectional Technologies | 33 | Expired |
| US4287267A | Zinc-chlorine battery plant system and method | Emerging Cross-Sectional Technologies | 32 | Expired |
| US3935024A | Halogen hydrates | Emerging Cross-Sectional Technologies | 32 | Expired |
| US4001036A | System for improving charge efficiency of a zinc-chloride battery | Electricity | 31 | Expired |
| US4071660A | Electrode for a zinc-chloride battery and batteries containing the same | Emerging Cross-Sectional Technologies | 30 | Expired |
| US4518664A | Comb-type bipolar stack | Emerging Cross-Sectional Technologies | 30 | Expired |
| US4072540A | Rechargeable electrical energy storage device | Emerging Cross-Sectional Technologies | 30 | Expired |
| US3954502A | Bipolar electrode for cell of high energy density secondary battery | Emerging Cross-Sectional Technologies | 29 | Expired |
| US4307159A | Zinc halogen battery electrolyte compositions with bismuth additive | Emerging Cross-Sectional Technologies | 29 | Expired |
| US4068043A | Pump battery system | Emerging Cross-Sectional Technologies | 28 | Expired |
| US3940283A | Halogen hydrates | Emerging Cross-Sectional Technologies | 27 | Expired |
| US4025697A | Apparatus for circulating electrolyte around multi-section batteries | Emerging Cross-Sectional Technologies | 27 | Expired |
| US4371825A | Method of minimizing the effects of parasitic currents | Emerging Cross-Sectional Technologies | 26 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.