| 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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| 07/24/2001 | US6265816 Spark plug, insulator for spark plug and process for fabricating the insulator |
| 07/24/2001 | US6265815 Spark plug and method of producing the same |
| 07/19/2001 | WO2001052376A1 Ignition plug and method of manufacture |
| 07/12/2001 | WO2001050013A2 Device for injecting fuel into an internal combustion engine |
| 07/12/2001 | US20010007196 Spark plug and producing method thereof |
| 06/28/2001 | DE10053173A1 Herstellungsverfahren für eine Zündkerze mit einem Edelmetallstück für einen Verbrennungsmotor Manufacturing method of a spark plug having a noble metal chip for an internal combustion engine |
| 06/27/2001 | EP1110284A1 Spark plug electrode |
| 06/13/2001 | EP1105953A1 Sealing a spark plug electrode |
| 05/22/2001 | US6236148 Spark plug with specific metal shell coating |
| 05/16/2001 | EP1099285A1 Wear-resistant spark plug electrode tip containing platinum alloys, spark plug containing the wear-resistant tip, and method of making same |
| 05/02/2001 | EP1095434A1 Spark plug electrode having iridium based sphere and method for manufacturing same |
| 05/02/2001 | EP1095433A1 Spark plug tip having platinum based alloys |
| 04/26/2001 | DE10052142A1 Production method for tubular metal casings for sparking plugs, involves cold forging using prepared dies and punching to produce tubular component with stepped tapered section |
| 04/10/2001 | US6215235 Spark plug having a noble metallic firing tip bonded to an electric discharge electrode and preferably installed in internal combustion engine |
| 03/15/2001 | WO2001018925A1 Method of forming a wear-resistant spark plug electrode tip using a molten metal droplet, and spark plug which is a product of the method |
| 03/08/2001 | DE19940455A1 Zündeinrichtung und Verfahren zur Herstellung derselben Ignition device and process for producing same |
| 03/01/2001 | WO2001015293A1 Ignition device and method for producing the same |
| 02/28/2001 | EP1079488A1 Spark plug and producing method therefor |
| 02/27/2001 | US6193575 Method and apparatus for securing distance of spark discharge gap of spark plug by means of image data processing |
| 02/15/2001 | WO2001011741A1 Method of manufacturing a spark plug with concentrically disposed double ring ground electrode |
| 02/15/2001 | CA2377871A1 Method of manufacturing a spark plug with concentrically disposed double ring ground electrode |
| 01/23/2001 | US6176124 Spark plug connector checking apparatus |
| 01/18/2001 | WO2001005009A1 Spark plug including a wear-resistant electrode tip made from a co-extruded composite material, and method of making same |
| 01/18/2001 | DE10025324A1 Lead free glaze for coating spark plugs contains silica, alumina, boron oxide and zinc oxide, is coated on an insulator surface |
| 12/21/2000 | WO2000077901A1 Spark plug shell having a bimetallic ground electrode, spark plug incorporating the shell, and method of making same |
| 12/20/2000 | CN1059732C Device for inspecting plug connection |
| 12/12/2000 | US6160695 Transient voltage protection device with ceramic substrate |
| 12/12/2000 | US6160342 Resistor-incorporated spark plug and manufacturing method of resistor-incorporated spark plug |
| 12/06/2000 | CN1059293C Spark plug |
| 11/02/2000 | EP1049222A1 Method of manufacturing spark plug and spark plug |
| 10/24/2000 | US6137211 Spark plug and producing method thereof |
| 10/17/2000 | US6132277 Application of precious metal to spark plug electrode |
| 10/12/2000 | DE10016338A1 Forming method for contact surface of grounding electrode of a spark plug comprises gas tight used ceramics insulator with a middle electrode and proceeding end having a round circuit lamina |
| 10/05/2000 | WO2000003464A9 Spark plug tip having platinum based alloys |
| 10/04/2000 | CN1268794A Surge supressor with no chip |
| 09/20/2000 | EP1037345A1 Surge absorber without chips |
| 08/30/2000 | EP1032100A2 Glow plug and spark plug, and manufacturing method therefor |
| 07/25/2000 | US6093071 Spark plug and process of producing same |
| 07/18/2000 | US6089885 Spark plug connector |
| 07/13/2000 | DE10000238A1 Verfahren und Gerät zum Sicherstellen eines Abstandes eines Funkenabgabespaltes von einer Zündkerze mittels Bilddatenverarbeitung Method and apparatus for securing a distance of a spark discharge gap of a spark plug using image processing |
| 06/27/2000 | US6080029 Method of manufacturing a spark plug with ground electrode concentrically disposed to a central electrode |
| 06/21/2000 | EP1010228A4 A transient voltage protection device and method of making same |
| 06/21/2000 | EP1010228A1 A transient voltage protection device and method of making same |
| 06/20/2000 | US6078131 Sealing a spark plug electrode |
| 06/20/2000 | US6078129 Spark plug having iridium containing noble metal chip attached via a molten bond |
| 06/14/2000 | CN1256806A Spark plug, alumina insulator for spark plug, and method of manufacturing the same |
| 06/07/2000 | EP1006631A2 Spark plug for internal combustion engine having better self-cleaning function |
| 06/06/2000 | US6071163 Wear-resistant spark plug electrode tip containing platinum alloys, spark plug containing the wear-resistant tip, and method of making same |
| 05/30/2000 | US6069434 Manufacture and method of assembly for a spark electrode |
| 05/23/2000 | US6067003 Surge absorber without chips |
| 05/09/2000 | US6060821 Heater equipped spark plug |
| 05/09/2000 | US6059983 Method for fabricating an overcoated printed circuit board with contaminant-free areas |
| 04/27/2000 | WO2000024098A1 Application of precious metal to spark plug electrode |
| 04/04/2000 | US6046532 Spark plug |
| 04/04/2000 | US6045424 Spark plug tip having platinum based alloys |
| 03/29/2000 | CN1050942C Sparking plug and its producing method |
| 03/23/2000 | WO2000003463A9 Wear-resistant spark plug electrode tip containing platinum alloys, spark plug containing the wear-resistant tip, and method of making same |
| 03/21/2000 | US6040055 Surface discharge element and a method of making the same |
| 03/09/2000 | WO2000013274A1 Spark plug electrode |
| 03/02/2000 | DE19838538A1 Zündkerzenelektrode Spark plug electrode |
| 03/01/2000 | EP0982820A1 Spark plug, alumina insulator for spark plug, and method of manufacturing the same |
| 02/24/2000 | WO2000010237A1 Sealing a spark plug electrode |
| 02/23/2000 | CN1245356A Sparking plug and producing method thereof |
| 01/26/2000 | EP0975075A2 A method for producing a spark plug |
| 01/20/2000 | WO2000003465A1 Spark plug electrode having iridium based sphere and method for manufacturing same |
| 01/20/2000 | WO2000003464A1 Spark plug tip having platinum based alloys |
| 01/20/2000 | WO2000003463A1 Wear-resistant spark plug electrode tip containing platinum alloys, spark plug containing the wear-resistant tip, and method of making same |
| 01/20/2000 | CA2337232A1 Spark plug tip having platinum based alloys |
| 01/11/2000 | US6013358 Transient voltage protection device with ceramic substrate |
| 12/09/1999 | DE19925672A1 Sparking plug for an internal combustion engine, and method for its manufacture |
| 11/24/1999 | EP0959542A1 Spark plug and method of manufacturing the same |
| 11/09/1999 | US5982080 Spark plug and its manufacturing method |
| 11/09/1999 | US5981904 Tandem cathodic cleaning device for wire |
| 11/09/1999 | US5980345 Spark plug electrode having iridium based sphere and method for manufacturing same |
| 11/03/1999 | EP0954074A2 Spark plug and process for fabricating the spark plug |
| 11/03/1999 | CN1233870A Surge absorber without chips |
| 11/02/1999 | US5977695 Spark plug having improved consumption resistance |
| 10/28/1999 | DE19817657A1 Spark plug connector for engine of hand-guided working machine |
| 10/27/1999 | EP0952646A1 Surge absorber without chips |
| 10/12/1999 | CA2011359C Ignition plug socket |
| 09/22/1999 | CN1045232C Technolog and special equipment for making lightning arrester core body |
| 09/14/1999 | US5950424 Diesel engine exhaust particle collection device |
| 09/08/1999 | EP0940896A1 Equipment and method for producing spark plug |
| 09/08/1999 | CN1227982A Equipment and method for producing spark plug |
| 09/07/1999 | US5948294 Device for cathodic cleaning of wire |
| 09/07/1999 | US5947071 Tool free quick change spark plug mechanism |
| 09/02/1999 | WO1999044266A1 Spark plug, alumina insulator for spark plug, and method of manufacturing the same |
| 09/02/1999 | CA2287241A1 Spark plug, alumina insulator for spark plug, and method of manufacturing the same |
| 08/18/1999 | EP0936710A1 Spark plug having a noble metallic firing tip bonded to an electric discharge electrode and preferably installed in an internal combustion engine |
| 08/04/1999 | EP0933847A1 Spark plug for internal combustion engine and method for manufacturing the same |
| 05/04/1999 | CA2121694C Double ignition system for internal combustion engines, ignition plug for double ignition systems, and electric spark generator |
| 01/26/1999 | US5864208 Spark gap device and method of manufacturing same |
| 01/05/1999 | US5856724 High efficiency, extended life spark plug having shaped firing tips |
| 12/22/1998 | US5852340 Low-voltage type igniter plug having a semiconductor for use in jet and other internal combustion engines and a method of making the semiconductor |
| 11/11/1998 | CN1198848A Electrode for spark plugs of internal combustion engines and process for manufacturing the same |
| 10/28/1998 | EP0874432A2 Spark plug incorporating a resistor and manufacturing method therefor |
| 10/21/1998 | EP0872928A1 Spark plug for internal combustion engine |
| 09/22/1998 | US5811915 Spark plug including electrode with protruding portion for holding noble metallic chip, and method of making the same |
| 08/26/1998 | EP0860043A1 Electrode for spark plugs of internal combustion engines and process for manufacturing the same |
| 08/19/1998 | EP0859437A1 Method of fixing a ground electrode on a metallic shell of a spark plug |