| Patents for H01T 21 - Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs (1,750) |
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| 08/08/2002 | US20020105254 Structure of spark plug designed to provide higher durability and ignitability of fuel |
| 08/01/2002 | WO2002060025A1 Method for producing a spark plug electrode |
| 08/01/2002 | US20020102898 Method for manufacturing spark plug and apparatus for carrying out the same |
| 07/25/2002 | WO2002057605A2 Robust torch jet spark plug electrode |
| 07/25/2002 | DE10103046A1 Applying precious metal to ignition plug electrode e.g.. for IC engine, involves feeding heat to joint region from electrode side remote from precious metal, at least partly through electrode towards precious metal |
| 07/25/2002 | DE10103045A1 Manufacturing ignition plug electrode involves joining electrode to precious metal using heat generated by continuously operating laser beam, causing melting in boundary region |
| 07/18/2002 | US20020094743 Fabrication machine for fabricating spark plug with plurality of ground electrodes and fabrication method using same |
| 07/18/2002 | US20020092835 Method of manufacturing electrode for plug |
| 07/10/2002 | EP1221187A1 Method of manufacturing a spark plug with concentrically disposed double ring ground electrode |
| 07/02/2002 | US6412465 Ignition device having a firing tip formed from a yttrium-stabilized platinum-tungsten alloy |
| 06/27/2002 | US20020081932 Manufacturing method for a spark plug |
| 06/27/2002 | US20020079801 Spark plug having a central electrode which is welded or soldered on and method for its production |
| 06/27/2002 | US20020078555 Manufacturing method for a spark plug |
| 06/20/2002 | US20020075125 Surge absorber without chips |
| 06/20/2002 | US20020074920 High efficiency, extended life spark plug having improved firing tips |
| 06/20/2002 | US20020073539 Method for manufacturing a spark plug |
| 06/18/2002 | US6407487 Includes al as a main component in the range of 85 to 98 wt % as a value converted into al2o3 and wherein and further a na component in the range of 0.07 to 0.5 wt % as a value converted into na2o; insulation resistance |
| 06/18/2002 | US6406345 Spark plug shell having a bimetallic ground electrode, spark plug incorporating the shell, and method of making same |
| 06/13/2002 | US20020070646 Enhanced thermal expansion divider layers for a high efficiency, extended life spark plug |
| 06/13/2002 | US20020070645 High efficiency, extended life spark plug having improved firing tips |
| 06/13/2002 | DE10137523A1 Zündkerze und Verfahren zu ihrer Herstellung Spark plug and method for their preparation |
| 06/12/2002 | EP1212818A1 Ignition device and method for producing the same |
| 06/06/2002 | US20020067112 Spark plug |
| 05/30/2002 | US20020063504 Spark plug designed to provide high durability and productivity |
| 05/29/2002 | EP1209784A1 Spark plug |
| 05/09/2002 | US20020055318 Method of producing a spark plug |
| 05/08/2002 | EP1203428A1 Spark plug including a wear-resistant electrode tip made from a co-extruded composite material, and method of making same |
| 05/02/2002 | US20020050775 Spark plug and method of manufacturing same |
| 04/24/2002 | CN1346167A Overpressure suction device and making method |
| 04/11/2002 | US20020041477 Surge absorber and production method thereof |
| 04/11/2002 | US20020041135 Spark plug and method of making the same |
| 04/11/2002 | DE10047499A1 Ignition spark plug for IC engine has central electrode secured in opening in foot part of cylindrical isolator via soldered or welded connection or radial compression joint |
| 04/02/2002 | US6366439 Surge absorber without chips |
| 04/02/2002 | US6366008 Spark plug and method of making the same |
| 03/21/2002 | US20020034915 Apparatus and method for adjusting spark gap of spark plug |
| 03/21/2002 | US20020033659 Spark plug |
| 03/20/2002 | EP1187982A2 Device for injecting a fuel into a combustion chamber of an internal combustion engine cylinder |
| 03/19/2002 | US6357274 Sparkplug manufacturing method |
| 03/13/2002 | EP1187278A2 A main element of a surge protector device |
| 03/13/2002 | CN1339653A Preheating plug and spark plug and its producing method |
| 03/06/2002 | EP1183762A1 Spark plug shell having a bimetallic ground electrode, spark plug incorporating the shell, and method of making same |
| 02/28/2002 | US20020024790 Main element of a surge protector device |
| 02/28/2002 | US20020024160 Used for an internal combustion engine such as an automobile engine |
| 02/21/2002 | US20020021066 Spark plug for an engine for a cogeneration system |
| 02/14/2002 | US20020017847 Spark plug and method of producing spark plug |
| 02/14/2002 | US20020017846 Spark plug and a method of producing the same |
| 02/14/2002 | DE10136748A1 Bilderzeugungsvorrichtung und zugehöriges Verfahren mit Laderreinigeraktivierung nach Lichtbogenfehler Image forming apparatus and associated method with charger cleaner activation by arcing faults |
| 02/13/2002 | CN1335659A Fine electrospark process of forming electrode |
| 02/07/2002 | WO2002011258A1 Ignition device having a firing tip formed from a yttrium-stabilized platinum-tungsten alloy |
| 02/07/2002 | WO2002010861A1 Image-forming machine having charger cleaning activation after an arcing fault and related method |
| 02/07/2002 | US20020014005 Middle electrode with precious metal reinforcement |
| 02/07/2002 | DE10131391A1 Ignition plug for co-generation engine has radial side electrode facing side of central electrode, with specified gap dimensions |
| 02/07/2002 | DE10036008A1 Zündkerze für einen Verbrennungsmotor und Verfahren zur Herstellung einer Zündkerze A spark plug for an internal combustion engine and method for manufacturing a spark plug |
| 02/06/2002 | EP1178363A2 Image forming device and associated method with charger cleaner activation after electrical arcing fault |
| 01/31/2002 | WO2002009247A1 Spark plug for an internal combustion engine and method for producing a spark plug |
| 01/31/2002 | US20020011768 Spark plug shell having a bimetallic ground electrode, spark plug incorporating the shell, and method of making same |
| 01/29/2002 | US6341501 Method of producing a spark plug |
| 01/24/2002 | US20020008952 Electrostatic discharge device of surface mount type and fabricating method thereof |
| 01/09/2002 | CN1330436A Sparking plug and manufacturing method thereof |
| 01/08/2002 | US6337533 Spark plug for internal combustion engine and method for manufacturing same |
| 01/02/2002 | EP1168548A1 Fabrication method of surge protector device and the device fabricated by the method |
| 01/02/2002 | EP1168547A1 Spark plug and method of producing spark plug |
| 01/02/2002 | EP1168544A1 Spark plug and method of making the same |
| 01/01/2002 | US6334800 Manufacturing method of resistor-incorporated spark plug |
| 12/20/2001 | WO2001050013A3 Device for injecting fuel into an internal combustion engine |
| 12/20/2001 | US20010053056 Fabrication method of surge protector device and the device fabricated by the method |
| 12/13/2001 | WO2001095447A1 Electrodes, method for production thereof and spark plugs with such an electrode |
| 12/13/2001 | US20010050522 Metal member with chromate coat, spark plug with chromate coat and manufacturing methods thereof |
| 12/13/2001 | DE10027651A1 Spark plug central electrode has tip containing platinum and iridium or ruthenium in different regions |
| 12/11/2001 | US6328619 Equipment and method for producing spark plug |
| 12/06/2001 | WO2001093389A1 Method and apparatus for making spark plug |
| 12/06/2001 | DE10025048A1 Mittelelektrode mit Edelmetallarmierung Center electrode with noble metal reinforcement |
| 12/05/2001 | CN2463926Y Chip-free surge absorber |
| 12/04/2001 | US6326719 Spark plug shell having a bimetallic ground electrode spark plug incorporating the shell, and method of making same |
| 11/29/2001 | DE10122938A1 Ignition plug has central and/or earth electrode of base material with area to which precious metal or alloy discharge tip is welded with molten section whose size is related to tip size |
| 11/28/2001 | EP1158632A1 Center electrode with noble metal reinforcement |
| 11/20/2001 | US6320302 Copper core side wire to carbon steel shell weld and method for manufacturing |
| 11/13/2001 | US6316868 Spark plug for internal combustion engine having better self-cleaning function |
| 10/18/2001 | US20010030495 Spark plug for an internal combustion engine and manufacturing method of the same |
| 10/18/2001 | US20010030494 Ground electrode for spark plug, spark plug and method of manufacturing the same |
| 10/18/2001 | DE10016416A1 Glaskeramik, Verfahren zu deren Herstellung und Zündkerze mit einer derartigen Glaskeramik Glass-ceramic, process for their preparation and the spark plug having such a glass ceramic |
| 10/17/2001 | CN1317857A Spark plug |
| 10/11/2001 | WO2001074731A1 Glass ceramic material, method for producing the same and spark plug containing such a glass ceramic material |
| 10/10/2001 | EP1143587A2 Spark plug for internal combustion engines and manufacturing method therof |
| 10/04/2001 | US20010025617 Spark plug for internal combustion engines and manufacturing method thereof |
| 10/04/2001 | EP1139530A2 Spark plug for an internal combustion engine and manufacturing method of the same |
| 09/13/2001 | WO2001067571A2 Spark plug for an internal combustion engine and method for production of a middle electrode for an internal combustion engine spark plug |
| 09/13/2001 | DE10107320A1 Zündkerze für Kogenerationszwecke und Einstellverfahren für den Funkenspalt Spark plug for Kogenerationszwecke and setting for the spark gap |
| 09/13/2001 | DE10011705A1 Sparking plug for IC engine, has center electrode and truncated cone shaped basic body with end facing toward combustion chamber, and includes fixed noble metal disc. |
| 09/12/2001 | EP1133037A2 Spark plug for internal combustion engine |
| 09/05/2001 | EP1130728A2 Spark plug |
| 09/04/2001 | US6285008 Ignition plug and method of manufacture |
| 08/30/2001 | US20010017293 Glow plug and spark plug, and manufacturing method therefor |
| 08/29/2001 | EP1128508A2 Metal member with chromate coat, spark plug with chromate coat and manufacturing methods thereof |
| 08/29/2001 | CA2339390A1 Spark plug |
| 08/23/2001 | US20010015602 Spark plug used for cogeneration purpose and adjusting method for discharging gap thereof |
| 08/23/2001 | DE10108864A1 Zündkerze und Verfahren zu ihrer Herstellung Spark plug and method for their preparation |
| 08/14/2001 | US6274971 Spark plug and method of manufacturing the same |
| 08/08/2001 | EP1121736A1 Application of precious metal to spark plug electrode |
| 08/02/2001 | WO2001011741A8 Method of manufacturing a spark plug with concentrically disposed double ring ground electrode |