Sem AB
Records under this name other than the patents Sem AB holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned. None of them is counted in the 15 patents it holds.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 11,391,259 | Crankshaft Driven Flywheel Magneto Generator with Circular Winding for Power Supply in Handheld Batteryless Combustion Engines Lapsed on the fee record Ended Jul 19, 2026 · High confidence | Lapsed on the fee record | Ended Jul 19, 2026 | High confidence |
| US 6,814,055 | Magnetic ignition system Term ended Term ended Feb 11, 2023 · From the USPTO record | Term ended | Term ended Feb 11, 2023 | From the USPTO record |
| US 6,766,787 | Magnetic ignition system Term ended Term ended Jan 18, 2023 · From the USPTO record | Term ended | Term ended Jan 18, 2023 | From the USPTO record |
| US 6,640,785 | Method and device for an internal combustion engine Term ended Term ended Oct 17, 2022 · From the USPTO record | Term ended | Term ended Oct 17, 2022 | From the USPTO record |
| US 6,018,986 | Method for carrying out an ionic current measurement in a combustion engine using a lean fuel mixture Term ended Term ended Oct 3, 2017 · From the USPTO record | Term ended | Term ended Oct 3, 2017 | From the USPTO record |
| US 6,029,640 | Method of detecting an ionization current Lapsed on the fee record Ended Feb 29, 2012 · From the USPTO record | Lapsed on the fee record | Ended Feb 29, 2012 | From the USPTO record |
| US 5,025,498 | Apparatus for controlling the trigger sequence in ignition systems Term ended Term ended no later than Jun 18, 2011 · Low confidence | Term ended | Term ended no later than Jun 18, 2011 | Low confidence |
| US 5,313,918 | Flywheel magneto arrangement Term ended Term ended no later than May 24, 2014 · Low confidence | Term ended | Term ended no later than May 24, 2014 | Low confidence |
| US 5,419,295 | Method for controlling the trigger sequence in a flywheel magneto system Term ended Term ended no later than May 30, 2015 · Low confidence | Term ended | Term ended no later than May 30, 2015 | Low confidence |
| US 5,645,037 | Ignition system for an internal combustion engine, particularly for use in a chain saw or the like Term ended Term ended no later than Jul 8, 2017 · Low confidence | Term ended | Term ended no later than Jul 8, 2017 | Low confidence |