| 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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| 08/27/2003 | EP1338065A2 Spark plug for an internal combustion engine and method for production of a middle electrode for an internal combustion engine spark plug |
| 08/21/2003 | US20030155850 Spark plug and method for manufacturing the spark plug |
| 08/21/2003 | US20030155849 Spark plug |
| 08/05/2003 | US6603246 Spark plug used for cogeneration purpose and adjusting method for discharging gap thereof |
| 08/05/2003 | US6603244 Spark plug and method of producing spark plug |
| 07/22/2003 | US6595818 Method of manufacturing electrode for plug |
| 07/15/2003 | US6592418 Method for manufacturing spark plug and apparatus for carrying out the same |
| 07/09/2003 | EP1221187A4 Method of manufacturing a spark plug with concentrically disposed double ring ground electrode |
| 07/08/2003 | US6590318 Spark plug having a reduced lead glaze layer on the insulator thereof |
| 07/08/2003 | US6589091 Fabrication machine for fabricating spark plug with plurality of ground electrodes and fabrication method using same |
| 07/03/2003 | WO2003055024A1 Sealing device and sealing method |
| 07/02/2003 | EP1324446A2 Spark plug and method for manufacturing the spark plug |
| 07/02/2003 | EP1324445A2 Spark plug and method for manufacturing the spark plug |
| 06/18/2003 | DE19940455C2 Zündeinrichtung,insbesondere Zündkerze für Ottomotoren, und Verfahren zur Lackierung derselben Ignition device, in particular spark plug for gasoline engines, and methods for coating the same |
| 06/12/2003 | WO2001067571A3 Spark plug for an internal combustion engine and method for production of a middle electrode for an internal combustion engine spark plug |
| 05/21/2003 | EP1313188A2 Chromate film-containing plug metal component and method for producing the same |
| 05/21/2003 | EP1312144A1 Ignition device having a firing tip formed from a yttrium-stabilized platinum-tungsten alloy |
| 05/21/2003 | CN1419724A Method for producing a spark plug electrode |
| 05/21/2003 | CN1419323A Metal element with chromate membrane for plug use and preparation process thereof |
| 05/08/2003 | US20030085202 Spark plug and method for its manufacture |
| 05/06/2003 | US6557508 Robust torch jet spark plug electrode |
| 05/02/2003 | EP1305858A1 Spark plug for an internal combustion engine and method for producing a spark plug |
| 05/01/2003 | US20030082982 Method for producing spark plug |
| 04/23/2003 | EP1304783A1 Method for manufacturing a spark plug and corresponding spark plug |
| 04/16/2003 | EP1303014A1 Spark plug and manufacturing method |
| 04/09/2003 | CN1409450A Method for producing sparking plug |
| 04/08/2003 | US6543430 Cassette for ignition coils and method of joining |
| 04/03/2003 | US20030062815 Production method of spark plug designed to provide high temperature oxidation resistance and weld strength and spark plug produced thereby |
| 03/25/2003 | US6538365 Metal member with chromate coat, spark plug with chromate coat and manufacturing methods thereof |
| 03/20/2003 | US20030051341 Glaze baked at relatively low temperature less to cause air bubbles to remain; excellent in chipping resistance. |
| 03/18/2003 | US6533629 Spark plug including a wear-resistant electrode tip made from a co-extruded composite material, and method of making same |
| 03/18/2003 | US6533628 Method of manufacturing spark plug and spark plug |
| 03/06/2003 | WO2003019746A2 A spark plug for an internal combustion engine |
| 02/27/2003 | WO2003017443A1 Method for placing a precious metal tip on an electrode, electrode and spark plug |
| 02/27/2003 | US20030038578 Spark plug and method of manufacturing same |
| 02/27/2003 | US20030038577 Structure of spark plug designed to provide higher durability and fabrication method thereof |
| 02/26/2003 | EP1286442A1 A spark plug for an internal combustion engine |
| 02/26/2003 | EP1285481A1 Method and apparatus for making spark plug |
| 02/25/2003 | US6523515 Spark plug for internal combustion engines and manufacturing method thereof |
| 02/13/2003 | WO2002057605A3 Robust torch jet spark plug electrode |
| 02/13/2003 | US20030030355 Spark plug |
| 02/12/2003 | CN1396687A Sparking plug |
| 01/30/2003 | US20030020388 Spark plug for an internal combustion engine and method for producing a spark plug |
| 01/29/2003 | EP0860043B1 Process for deposition and manufacturing electrodes for spark plugs of internal combustion engines |
| 01/15/2003 | EP1099285B1 Wear-resistant spark plug electrode tip containing platinum alloys, spark plug containing the wear-resistant tip, and method of making same |
| 01/15/2003 | EP1095433B1 Spark plug tip having platinum based alloys |
| 01/09/2003 | US20030005740 Fabrication method of metal shell of spark plug |
| 01/08/2003 | EP1274157A1 Spark plug |
| 01/02/2003 | EP1271726A2 Method for producing spark plug |
| 01/02/2003 | EP1268355A1 Glass ceramic material, method for producing the same and spark plug containing such a glass ceramic material |
| 12/26/2002 | US20020195917 Method for fabricating spark plug with piezoelectric sensor and spark plug fabricated by the same |
| 12/25/2002 | CN1387290A Spark plug with multi-point ignition and its making method |
| 12/25/2002 | CN1097145C Diesel engine exhaust particle collection device |
| 12/19/2002 | US20020193033 Method for manufactoring spark plug and caulking metallic mold |
| 12/18/2002 | EP1267462A1 Cassette for ignition coils and method of joining |
| 12/18/2002 | EP1095434B1 Spark plug electrode having iridium based sphere and method for manufacturing same |
| 12/12/2002 | US20020185118 Cassette for ignition coils and method of joining |
| 12/11/2002 | EP1265329A1 Spark plug of an internal combustion engine |
| 12/11/2002 | EP1265328A1 Spark plug of an internal combustion engine |
| 12/11/2002 | CN1384570A Spark plug producing method |
| 12/11/2002 | CN1384569A Spark plug producing method and interstitial metal mold |
| 12/10/2002 | US6492289 Coating of at least silicon, boron and aluminum oxides; low temperature firing |
| 12/05/2002 | US20020180326 Spark plug of an internal combustion engine |
| 11/21/2002 | US20020171346 Electrodes, method for production thereof and spark plugs with such an electrode |
| 11/19/2002 | US6481422 Device for injecting a fuel into a combustion chamber of an internal combustion engine |
| 11/07/2002 | US20020163286 Glow plug and spark plug, and manufacturing method therefor |
| 11/06/2002 | EP1255337A2 Method for producing spark plug |
| 11/02/2002 | CA2384444A1 Method for producing spark plug |
| 10/31/2002 | US20020158559 Spark plug and method of producing spark plug |
| 10/30/2002 | EP1253689A2 Method for manufacturing spark plug and caulking metallic mold |
| 10/17/2002 | US20020149307 Spark plug for an internal combustion engine and method for production of a middle electrode for an internal combustion engine spark plug |
| 10/09/2002 | EP1247317A1 Ignition plug and method of manufacture |
| 10/03/2002 | US20020142696 Method for manufacturing spark plug and apparatus for carrying out the same |
| 09/26/2002 | US20020134347 Device for injecting a fuel into a combustion chamber of an internal combustion engine |
| 09/26/2002 | DE10201698A1 Verfahren zur Anfertigung einer Zündkerzenelektrode Procedure for making a spark plug electrode |
| 09/25/2002 | EP1244189A2 Spark plug and method of producing same |
| 09/19/2002 | US20020130603 Spark plug and method of producing same |
| 09/19/2002 | US20020130602 Spark plug and its manufacturing method |
| 09/18/2002 | EP1241753A2 Spark plug and its manufacturing method |
| 09/18/2002 | CN1369942A Mfg. method of spark plug and its mfg. appts. |
| 09/18/2002 | CN1369941A Mfg. method of spark plug and its mfg. appts. |
| 09/12/2002 | DE10205588A1 Aufbau einer Zündkerze, der für einen höheren Verschleißwiderstand einer Mittelelektrode sorgt, und Verfahren zum Herstellen von selbiger Structure of a spark plug that provides a higher resistance to wear of a center electrode, and method for producing Selbiger |
| 09/12/2002 | DE10205078A1 Zündkerzenaufbau mit höherer Haltbarkeit und höherem Kraftstoffzündvermögen Spark structure with higher durability and higher Kraftstoffzündvermögen |
| 09/12/2002 | DE10205075A1 Zündkerze und Verfahren zu ihrer Herstellung Spark plug and method for their preparation |
| 09/11/2002 | CN1369124A Method of manufacturing spark plug with concentrically disposed double ring ground electrode |
| 09/10/2002 | US6449447 Image-forming machine having charger cleaning activation after an arcing fault and related method |
| 09/05/2002 | US20020121849 Spark plug and a method of producing the same |
| 09/04/2002 | EP1237244A2 Spark plug and method of producing spark plug |
| 08/28/2002 | EP1235319A2 Spark plug for internal combustion engine having better self-cleaning function |
| 08/22/2002 | WO2002065604A1 Method of manufacturing spark plug |
| 08/22/2002 | WO2002065602A1 Platinum alloy composition for a spark plug electrode for an internal combustion engine |
| 08/22/2002 | WO2002065601A1 Method for reinforcing a ground electrode for an internal combustion engine |
| 08/22/2002 | US20020115549 Starting glass fused from silicon dioxide, aluminum oxide, titanium dioxide and calcium oxide is a fused seal with crystalline phases in some areas |
| 08/22/2002 | US20020112687 Robust torch jet spark plug electrode |
| 08/21/2002 | CN1365531A Method and apparatus for making spark plug |
| 08/20/2002 | US6437493 Glow plug and spark plug, and manufacturing method therefor |
| 08/15/2002 | US20020109447 Structure of spark plug designed to provide higher wear resistance to center electrode and production method thereof |
| 08/14/2002 | EP1231689A2 Method for manufacturing spark plug and apparatus for carrying out the same |
| 08/14/2002 | EP1231688A2 Method for manufacturing spark plug and apparatus for carrying out the same |
| 08/14/2002 | EP1230720A1 Electrodes, method for production thereof and spark plugs with such an electrode |