Assignee
SEM AB
SE·28 granted patents·6 pending applications·108 citations·filing 1989–2023
Top patents by PatentIndex Score
34 records- 0178US12368306B2Battery assembly with controllable voltage and method related theretoSEM AB·Filed 2020·Granted Jul 22, 2025·1 cites·19 claims
- 0277US9353723B2Ignition system including a measurement device for providing measurement signals to a combustion engine's control systemSEM AB·Filed 2013·Granted May 31, 2016·3 cites·14 claims
- 0376US12173678B2Ignition system and method controlling spark ignited combustion enginesSEM AB·Filed 2019·Granted Dec 24, 2024·2 cites·21 claims
- 0475US6029640AMethod of detecting an ionization currentSEM AB·Filed 1997·Granted Feb 29, 2000·23 cites·16 claims
- 0568US9945303B2System and method for controlling the performance of an engineSEM AB·Filed 2014·Granted Apr 17, 2018·2 cites·18 claims
- 0662US10989160B2Method for monitoring combustion processes in a combustion engineSEM AB·Filed 2019·Granted Apr 27, 2021·0 cites·10 claims
- 0762US7712458B2Method and apparatus for raising the spark energy in capacitive ignition systemsSEM AB·Filed 2007·Granted May 11, 2010·4 cites·7 claims
- 0862US5681152AMembrane type fluid pumpSEM AB·Filed 1994·Granted Oct 28, 1997·24 cites·13 claims
- 0961US9945751B2Engine management using knock dataSEM AB·Filed 2014·Granted Apr 17, 2018·2 cites·20 claims
- 1061US6640785B2Method and device for an internal combustion engineSEM AB·Filed 2001·Granted Nov 4, 2003·9 cites·13 claims
- 1159US2025257683A1Tubular structure adapted to at least partly enclose a pencil coil for internal combustion enginesSEM AB·Filed 2023·Application pending·0 cites
- 1257US2025183457A1Fault tolerant battery module comprising parallel branches and voltage sensing assemblySEM AB·Filed 2023·Application pending·0 cites
- 1356US10164410B2Spark plug extensionSEM AB·Filed 2013·Granted Dec 25, 2018·1 cites·12 claims
- 1456US2025183683A1Battery module comprising parallel branches and voltage sensing assemblySEM AB·Filed 2023·Application pending·0 cites
- 1554US9651453B2Method for monitoring combustion processes in a combustion engineSEM AB·Filed 2013·Granted May 16, 2017·1 cites·8 claims
- 1653US11391259B2Crankshaft driven flywheel magneto generator with circular winding for power supply in handheld batteryless combustion enginesSEM AB·Filed 2019·Granted Jul 19, 2022·0 cites·11 claims
- 1753US10288032B2Method for monitoring combustion processes in a combustion engineSEM AB·Filed 2017·Granted May 14, 2019·0 cites·1 claims
- 1852US12392310B2Ignition coil assembly for combustion engineSEM AB·Filed 2022·Granted Aug 19, 2025·0 cites·12 claims
- 1952US11560869B2Electronic circuit and capacitor discharge system comprising electronic circuitSEM AB·Filed 2021·Granted Jan 24, 2023·0 cites·19 claims
- 2051US10466129B2Measurement of knock intensitySEM AB·Filed 2014·Granted Nov 5, 2019·0 cites·20 claims
- 2150US7953543B2Device and method for communication between a control system for small internal combustion engines and an external computerSEM AB·Filed 2006·Granted May 31, 2011·2 cites·17 claims
- 2248US2025105652A1Battery assemblies, battery arrangement and use for controlling currentSEM AB·Filed 2020·Application pending·0 cites
- 2347US2025266693A1Circuit arrangement for controlling output voltageSEM AB·Filed 2021·Application pending·0 cites
- 2446US6814055B2Magnetic ignition systemSEM AB·Filed 2001·Granted Nov 9, 2004·5 cites·4 claims
- 2545US11225939B2Spark plug extensionSEM AB·Filed 2018·Granted Jan 18, 2022·0 cites·15 claims
- 2644US5419295AMethod for controlling the trigger sequence in a flywheel magneto systemSEM AB·Filed 1992·Granted May 30, 1995·6 cites·2 claims
- 2741US9810191B2Engine for vehicle using alternative fuelsSEM AB·Filed 2013·Granted Nov 7, 2017·0 cites·13 claims
- 2841US6766787B2Magnetic ignition systemSEM AB·Filed 2001·Granted Jul 27, 2004·4 cites·5 claims
- 2941US2020003582A1Inductive Position Sensor with Improved Magnetic Shield and Plunger Core DesignSEM AB·Filed 2018·Application pending·0 cites
- 3039US5313918AFlywheel magneto arrangementSEM AB·Filed 1990·Granted May 24, 1994·7 cites·5 claims
- 3138US5025498AApparatus for controlling the trigger sequence in ignition systemsSEM AB·Filed 1989·Granted Jun 18, 1991·5 cites·1 claims
- 3236US5804933AMethod for operating an adjusting apparatus and means for adjusting a positional deviceSEM AB·Filed 1995·Granted Sep 8, 1998·5 cites·8 claims
- 3331US6018986AMethod for carrying out an ionic current measurement in a combustion engine using a lean fuel mixtureSEM AB·Filed 1996·Granted Feb 1, 2000·2 cites·18 claims
- 3427USD726112SSpark plug extensionSEM AB·Filed 2013·Granted Apr 7, 2015·0 cites·1 claims
Join the waitlist — get patent alerts
Get an alert when SEM AB files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →