EtaGen, Inc.
31Patents
31Active
31Granted
54Portfolio score
Filing activity: Nov 23, 2010 → Jan 15, 2019
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8413617B2 | High-efficiency two-piston linear combustion engine | Mechanical Engineering; Lighting; Heating | 24 | Active |
| US9657675B1 | Control of piston trajectory in a free-piston combustion engine | Mechanical Engineering; Lighting; Heating | 17 | Active |
| US8402931B2 | High-efficiency linear combustion engine | Emerging Cross-Sectional Technologies | 15 | Active |
| US9856821B1 | Open-faced piston assembly | Mechanical Engineering; Lighting; Heating | 13 | Active |
| US8662029B2 | High-efficiency linear combustion engine | Emerging Cross-Sectional Technologies | 7 | Active |
| US10436322B2 | Piston sealing ring assemblies | Mechanical Engineering; Lighting; Heating | 7 | Active |
| US8344669B1 | Methods and systems for controlling a multiphase electromagnetic machine | Electricity | 7 | Active |
| US10443727B2 | Sealing ring assemblies configured for pressure locking | Mechanical Engineering; Lighting; Heating | 6 | Active |
| US10408150B2 | Control of piston trajectory in a free-piston combustion engine | Mechanical Engineering; Lighting; Heating | 5 | Active |
| US9719415B2 | Energy storage and conversion in free-piston combustion engines | Electricity | 4 | Active |
| US10359002B2 | Open-faced piston assembly | Mechanical Engineering; Lighting; Heating | 3 | Active |
| US9567898B2 | High-efficiency linear combustion engine | Emerging Cross-Sectional Technologies | 3 | Active |
| US8997699B2 | Linear free piston combustion engine with indirect work extraction via gas linkage | Mechanical Engineering; Lighting; Heating | 3 | Active |
| US10156198B2 | Control of piston trajectory in a free-piston combustion engine | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US10404199B2 | Auto-braking for an electromagnetic machine | Electricity | 2 | Active |
| US8720317B2 | Methods and systems for managing a clearance gap in a piston engine | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US8624542B2 | Methods and systems for controlling a multiphase electromagnetic machine | Electricity | 1 | Active |
| US8656895B2 | Methods and systems for managing a clearance gap in a piston engine | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US8453612B2 | High-efficiency linear combustion engine | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US9004038B2 | Methods and systems for managing a clearance gap in a piston engine | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US10190490B2 | Energy storage and conversion in free-piston combustion engines | Electricity | 0 | Active |
| US10006401B2 | Methods and systems for managing a clearance gap in a piston engine | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US10554099B2 | DC-DC converter in a non-steady system | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US10215229B2 | Mechanism for maintaining a clearance gap | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US10221759B2 | High-efficiency linear combustion engine | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.