SEM AB
24Patents
14Active
24Granted
41Portfolio score
Filing activity: Jul 27, 1989 → Mar 4, 2022 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6029640A | Method of detecting an ionization current | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US5681152A | Membrane type fluid pump | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US5419295A | Method for controlling the trigger sequence in a flywheel magneto system | Emerging Cross-Sectional Technologies | 4 | Expired |
| US5025498A | Apparatus for controlling the trigger sequence in ignition systems | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US6640785B2 | Method and device for an internal combustion engine | Emerging Cross-Sectional Technologies | 4 | Expired |
| US5313918A | Flywheel magneto arrangement | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US9945751B2 | Engine management using knock data | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US6766787B2 | Magnetic ignition system | Mechanical Engineering; Lighting; Heating | 2 | Expired |
| US9353723B2 | Ignition system including a measurement device for providing measurement signals to a combustion engine's control system | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US6814055B2 | Magnetic ignition system | Mechanical Engineering; Lighting; Heating | 2 | Expired |
| US5804933A | Method for operating an adjusting apparatus and means for adjusting a positional device | Electricity | 1 | Expired |
| US9945303B2 | System and method for controlling the performance of an engine | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US6018986A | Method for carrying out an ionic current measurement in a combustion engine using a lean fuel mixture | Mechanical Engineering; Lighting; Heating | 1 | Expired |
| US10164410B2 | Spark plug extension | Emerging Cross-Sectional Technologies | 1 | Active |
| US9651453B2 | Method for monitoring combustion processes in a combustion engine | Emerging Cross-Sectional Technologies | 1 | Active |
| US10989160B2 | Method for monitoring combustion processes in a combustion engine | Emerging Cross-Sectional Technologies | 0 | Active |
| US10288032B2 | Method for monitoring combustion processes in a combustion engine | Emerging Cross-Sectional Technologies | 0 | Active |
| US12173678B2 | Ignition system and method controlling spark ignited combustion engines | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US12392310B2 | Ignition coil assembly for combustion engine | Emerging Cross-Sectional Technologies | 0 | Active |
| US12368306B2 | Battery assembly with controllable voltage and method related thereto | Emerging Cross-Sectional Technologies | 0 | Active |
| USD726112S1 | Spark plug extension | General | 0 | Active |
| US9810191B2 | Engine for vehicle using alternative fuels | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US11225939B2 | Spark plug extension | Electricity | 0 | Active |
| US11560869B2 | Electronic circuit and capacitor discharge system comprising electronic circuit | Mechanical Engineering; Lighting; Heating | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.