Assignee
SEM AB
SE28 patents
Top patents by PatentIndex Score
US6029640AFeb 29, 2000
Method of detecting an ionization current
SEM AB23 citations89
US5681152AOct 28, 1997
Membrane type fluid pump
SEM AB24 citations84
US6640785B2Nov 4, 2003
Method and device for an internal combustion engine
SEM AB9 citations71
US9353723B2May 31, 2016
Ignition system including a measurement device for providing measurement signals to a combustion engine's control system
SEM AB3 citations70
US9945303B2Apr 17, 2018
System and method for controlling the performance of an engine
SEM AB2 citations69
US5313918AMay 24, 1994
Flywheel magneto arrangement
SEM AB7 citations65
US12368306B2Jul 22, 2025
Battery assembly with controllable voltage and method related thereto
SEM AB1 citations64
US7953543B2May 31, 2011
Device and method for communication between a control system for small internal combustion engines and an external computer
SEM AB2 citations62
US7712458B2May 11, 2010
Method and apparatus for raising the spark energy in capacitive ignition systems
SEM AB4 citations62
US5419295AMay 30, 1995
Method for controlling the trigger sequence in a flywheel magneto system
SEM AB6 citations62
US12173678B2Dec 24, 2024
Ignition system and method controlling spark ignited combustion engines
SEM AB2 citations60
US6018986AFeb 1, 2000
Method for carrying out an ionic current measurement in a combustion engine using a lean fuel mixture
SEM AB2 citations59
US9945751B2Apr 17, 2018
Engine management using knock data
SEM AB2 citations57
US6814055B2Nov 9, 2004
Magnetic ignition system
SEM AB5 citations56
US6766787B2Jul 27, 2004
Magnetic ignition system
SEM AB4 citations56
US5804933ASep 8, 1998
Method for operating an adjusting apparatus and means for adjusting a positional device
SEM AB5 citations54
US5025498AJun 18, 1991
Apparatus for controlling the trigger sequence in ignition systems
SEM AB5 citations54
US10989160B2Apr 27, 2021
Method for monitoring combustion processes in a combustion engine
SEM AB0 citations53
US9651453B2May 16, 2017
Method for monitoring combustion processes in a combustion engine
SEM AB1 citations53
US12392310B2Aug 19, 2025
Ignition coil assembly for combustion engine
SEM AB0 citations50
US11391259B2Jul 19, 2022
Crankshaft driven flywheel magneto generator with circular winding for power supply in handheld batteryless combustion engines
SEM AB0 citations49
US11560869B2Jan 24, 2023
Electronic circuit and capacitor discharge system comprising electronic circuit
SEM AB0 citations48
US10164410B2Dec 25, 2018
Spark plug extension
SEM AB1 citations44
US11225939B2Jan 18, 2022
Spark plug extension
SEM AB0 citations43
USD726112SApr 7, 2015
Spark plug extension
SEM AB0 citations43
US10288032B2May 14, 2019
Method for monitoring combustion processes in a combustion engine
SEM AB0 citations42
US10466129B2Nov 5, 2019
Measurement of knock intensity
SEM AB0 citations39
US9810191B2Nov 7, 2017
Engine for vehicle using alternative fuels
SEM AB0 citations33