| 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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| 01/24/2012 | US8102106 Spark plug and method of manufacturing the same |
| 01/19/2012 | US20120015578 Method of manufacturing sparkplugs |
| 01/19/2012 | US20120013239 Multi-spark spark plugs and methods of manufacture |
| 01/18/2012 | EP2408071A1 Spark plug for internal combustion engine and method of manufacturing same |
| 01/12/2012 | DE112009000786T5 Zündkerze und Verfahren zur Herstellung derselben Spark plug and method for manufacturing the same |
| 01/10/2012 | US8092269 Method of manufacturing spark plug |
| 01/05/2012 | WO2012000697A1 Spark gap, printed circuit board and method for producing same |
| 01/05/2012 | US20120001533 Spark plug and its manufacturing method |
| 01/05/2012 | US20120001532 Manufacturing apparatus and manufacturing method for spark plugs |
| 01/04/2012 | CN102308447A Spark plug for internal combustion engine and method of manufacturing same |
| 01/03/2012 | US8087961 Method of producing a spark plug that has a high dimensional accuracy in the spark gap |
| 12/29/2011 | US20110316408 Spark plug for internal combustion engine and method of manufacturing same |
| 12/28/2011 | CN102299485A Esd保护装置的制造方法及esd保护装置 Esd protection device manufacturing method and esd protection devices |
| 12/15/2011 | US20110304256 Spark plug and manufacturing method thereof |
| 12/14/2011 | EP2395615A1 Method for measuring deviation of connecting position of member, method for producing spark plug |
| 12/14/2011 | EP2395614A2 Spark plug and manufacturing method thereof |
| 12/14/2011 | CN202076676U 火花塞加粉装置 Spark Plug powder device |
| 12/01/2011 | WO2011150188A1 Igniter assembly including arcing reduction features |
| 12/01/2011 | US20110291543 Igniter assembly including arcing reduction features |
| 11/24/2011 | WO2011144402A1 Method for producing a high-voltage switching spark gap |
| 11/24/2011 | US20110287683 Method for measuring deviation of joint position of member and method for producing spark plug |
| 11/23/2011 | EP1356555B1 Method for producing a spark plug electrode |
| 11/23/2011 | CN102255247A HF ignition device and method of producing the same |
| 11/23/2011 | CN102255245A Method of producing spark plug and spark plug made with the method |
| 11/17/2011 | WO2011143032A1 Spark ignition device and ground electrode therefor and methods of construction thereof |
| 11/17/2011 | US20110279009 Spark ignition device and ground electrode therefor and methods of construction thereof |
| 11/16/2011 | CN101282024B Technique for retrofitting waste and old sparking plug |
| 11/09/2011 | CN202034674U Spark plug with metallization processed conductive ceramic central electrode prepared by co-firing method |
| 11/08/2011 | US8052495 Method for producing spark plug by projection welding and spark plug thereof |
| 10/20/2011 | WO2011130365A1 Igniter including a corona enhancing electrode tip |
| 10/20/2011 | WO2011129439A1 Spark plug for internal combustion engine and method of manufacturing spark plug |
| 10/19/2011 | CN102224649A Esd protection device and manufacturing method thereof |
| 10/11/2011 | US8033880 Method for manufacturing spark plug |
| 10/06/2011 | WO2011123229A1 Spark ignition device and ground electrode therefor and methods of construction thereof |
| 10/06/2011 | US20110241525 High thread spark plug with undercut insulator |
| 10/06/2011 | US20110241524 Spark plug and manufacturing method thereof |
| 10/06/2011 | US20110241522 Spark ignition device for an internal combustion engine, metal shell therefor and methods of construction thereof |
| 10/06/2011 | US20110241521 Spark plug electrode and method of manufacture |
| 09/28/2011 | CN102204043A Spark plug and manufacturing method thereof |
| 09/27/2011 | US8026654 Ignition device having an induction welded and laser weld reinforced firing tip and method of construction |
| 09/22/2011 | US20110227472 Spark Plug and Method for Manufacturing a Spark Plug |
| 09/21/2011 | CN102195238A Method of manufacturing metal shell assembly for spark plug, method of manufacturing spark plug, and apparatus for manufacturing metal shell assembly for spark plug |
| 09/21/2011 | CN102195236A Spark plug and method for manufacturing a spark plug |
| 09/15/2011 | WO2011111128A1 Spark plug, main fitting used for spark plug and spark plug manufacturing method |
| 09/14/2011 | CN102187536A Spark plug and method for the manufacture thereof |
| 09/14/2011 | CN102185256A Ceramic insulator especially based on aluminum oxide and manufacture method thereof |
| 09/08/2011 | US20110215703 Pre-chamber spark plug |
| 09/07/2011 | EP2363929A2 Prechamber spark plug |
| 09/07/2011 | CN102177630A Spark plug and manufacturing method thereof |
| 09/07/2011 | CN102177629A 火花塞及其制造方法 And a method of manufacturing the spark plug |
| 09/06/2011 | US8013503 Spark plug for internal combustion engine having ground electrode with thick, thin and stepped portion and method for producing the spark plug |
| 09/01/2011 | US20110210659 Spark plug and manufacturing method therefor |
| 09/01/2011 | DE102011009593A1 Verfahren zum Herstellen einer Metallgehäusebaugruppe für eine Zündkerze, Verfahren zum Herstellen einer Zündkerze und Vorrichtung zum Herstellen einer Metallgehäusebaugruppe für eine Zündkerze A method of manufacturing a metal housing assembly for a spark plug, a spark plug and method for manufacturing apparatus for manufacturing a metal housing assembly for a spark plug |
| 08/31/2011 | CN102171900A Method for manufacturing spark plug and device for manufacturing spark plug |
| 08/18/2011 | WO2011098066A1 Spark plug and method for plasma ignition of mixtures containing fuel, in particular in internal combustion engines and internal combustion turbines |
| 08/18/2011 | US20110198982 Spark plug and method of manufacturing the same |
| 08/17/2011 | CN102160247A Method for manufacturing spark plug and device for manufacturing spark plug |
| 08/11/2011 | US20110193471 Spark plug and manufacturing method therefor |
| 08/11/2011 | US20110193470 Spark plug and manufacturing method thereof |
| 08/11/2011 | US20110193469 Spark plug and method of manufacturing the same |
| 08/03/2011 | EP2352211A1 Esd protection device and manufacturing method thereof |
| 08/03/2011 | CN102142660A Spark plug grounding electrode with multilayer structure and manufacturing method thereof |
| 08/02/2011 | CA2511147C Spark gap apparatus and method for electrostatic discharge protection |
| 07/28/2011 | US20110183573 Method of manufacturing metal shell assembly for spark plug, method of manufacturing spark plug, and apparatus for manufacturing metal shell assembly for spark plug |
| 07/21/2011 | WO2011086651A1 Spark plug and method of manufacturing spark plug |
| 07/21/2011 | US20110177744 Method for producing a spark plug electrode |
| 07/20/2011 | EP2346125A1 Spark plug and manufacturing method therefor |
| 07/20/2011 | EP1680844B1 Spark plug center electrode assembly |
| 07/19/2011 | US7980908 Spark plug and method for production of a spark plug |
| 07/14/2011 | US20110171870 Spark plug manufacturing method and spark plug manufacturing apparatus |
| 07/13/2011 | CN102122799A Spark plug and method for producing spark plug |
| 07/13/2011 | CN102122798A Spark plug and method for producing spark plug |
| 07/13/2011 | CN102122797A Spark plug and method of manufacturing the same |
| 07/13/2011 | CN102122795A Metalized conductive ceramic center electrode spark plug based on co-firing process and manufacturing method thereof |
| 06/30/2011 | WO2011075754A1 Spark plug having a hole for adjustment |
| 06/29/2011 | EP2339705A1 Spark plug and manufacturing method thereof |
| 06/29/2011 | EP2339704A1 Spark plug and manufacturing method thereof |
| 06/23/2011 | US20110148275 Spark plug and process for producing same |
| 06/23/2011 | US20110148273 Spark plug and method of manufacturing the same |
| 06/22/2011 | EP2337172A1 Method for manufacturing spark plug and device for manufacturing spark plug |
| 06/15/2011 | EP2333917A1 Method for manufacturing spark plug and device for manufacturing spark plug |
| 06/15/2011 | EP2333916A1 Sparkplug and manufacturing method therefor |
| 06/15/2011 | CN102097748A Sheet-type surge absorber and producing method thereof |
| 06/14/2011 | US7959482 Manufacturing method for ignition plug involves removing leading end portion of shell extended from end surface of insulator |
| 06/09/2011 | US20110133626 Spark plug for internal combustion engine and method of manufacturing the same |
| 06/09/2011 | US20110133625 Spark plug and method of manufacturing the same |
| 06/08/2011 | EP2330701A2 Spark plug and method of manufacturing the same |
| 06/08/2011 | EP2329569A2 Composite ceramic electrode, ignition device therewith and methods of construction thereof |
| 05/26/2011 | US20110121712 Spark plug with volume-stable electrode material |
| 05/25/2011 | CN1628402B Spark plug for an internal combustion engine and its manufacture method |
| 05/17/2011 | US7944135 Spark plug and methods of construction thereof |
| 05/11/2011 | EP2319147A2 Spark plug and methods of construction thereof |
| 05/11/2011 | EP2319146A2 Ceramic electrode, ignition device therewith and methods of construction thereof |
| 05/04/2011 | EP1553672B1 Method of detecting protrudent adhered matters and method of making spark plug using the same |
| 04/28/2011 | WO2011048882A1 Spark plug and method for producing spark plug |
| 04/14/2011 | DE10205588B4 Zündkerze mit einem höheren Verschleißwiderstand an der Mittelelektrode, und Verfahren zum Herstellen derselben A spark plug with a higher wear resistance at the center electrode, and method of manufacturing the same |
| 04/13/2011 | CN201797233U Screw assembly device |
| 04/13/2011 | CN201797232U Central electrode feeding and charging device |
| 04/07/2011 | WO2011040435A1 Esd protection device and manufacturing method thereof |
| 04/06/2011 | EP2306606A1 Spark plug for internal combustion engine and method of manufacturing the same |