ClassID:

216305

H01T21/02 - page 2 - CPC Classification

Classification description:

Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs of sparking plugs

Recent Application in this class:
#301
20130012094
2013-01-10

Spark ignition device and ground electrode therefor and methods of construction thereof

#302
20130009539
2013-01-10

Spark ignition device and ground electrode therefor and methods of construction thereof

#303
20130009534
2013-01-10

Igniter plug with cooling fluid and method of manufacturing igniter plug

#304
20130002122
2013-01-03

Spark plug electrode configuration

#305
20130002121
2013-01-03

Electrode material for a spark plug

#306
20120325520
2012-12-27

High thread spark plug with undercut insulator

#307
20120319556
2012-12-20

Spark plug and method for manufacturing spark plug

#308
20120306346
2012-12-06

Spark plug

#309
20120306345
2012-12-06

Spark plug

#310
20120299459
2012-11-29

Spark plug and method of manufacturing spark plug

#311
20120299457
2012-11-29

Anti-fouling spark plug and method of making

#312
20120289115
2012-11-15

Spark plug for internal combustion engine and manufacturing method thereof

#313
20120279468
2012-11-08

Corona igniter having controlled location of corona formation

#314
20120274200
2012-11-01

Spark plug having improved ground electrode orientation and method of forming

#315
20120262049
2012-10-18

Spark plug and process for producing spark plug

#316
20120258644
2012-10-11

Spark plug manufacturing method

#317
20120252298
2012-10-04

Method of manufacturing spark plug

#318
20120235555
2012-09-20

Spark plug and method for the production thereof

#319
20120212119
2012-08-23

Electrode material for a spark plug

#320
20120210968
2012-08-23

CORONA IGNITER WITH IMPROVED CORONA CONTROL

#321
20120208424
2012-08-16

Method for manufacturing a spark plug for preventing deformation caused by cutting a center electrode

#322
20120199088
2012-08-09

Corona ignition device having asymmetric firing tip

#323
20120196498
2012-08-02

Method of manufacturing a spark plug electrode and a spark plug

#324
20120194056
2012-08-02

Electrode material for a spark plug

#325
20120192824
2012-08-02

Corona igniter having improved gap control

#326
20120187820
2012-07-26

Spark plug and method of manufacturing the same

#327
20120186723
2012-07-26

TiSiCbased material, electrode, spark plug and manufacturing method thereof

#328
20120184171
2012-07-19

Method for manufacturing ignition plug

#329
20120176724
2012-07-12

Corona igniter including ignition coil with improved isolation

#330
20120176020
2012-07-12

Spark ignition device and ground electrode therefor and methods of construction thereof

#331
20120176019
2012-07-12

Spark plug

#332
20120169207
2012-07-05

Spark plug

#333
20120169205
2012-07-05

Anti-fouling spark plug and method of making

#334
20120146484
2012-06-14

Spark plug for internal combustion engine and method of manufacturing spark plug

#335
20120146483
2012-06-14

Structure of spark plug designed to ensure improved productivity

#336
20120142244
2012-06-07

Method of manufacturing center electrode and spark plug

#337
20120142243
2012-06-07

High power discharge fuel ignitor

#338
20120139406
2012-06-07

Igniter for igniting a fuel/air mixture in an internal combustion engine using a corona discharge

#339
20120139405
2012-06-07

Anti-fouling spark plug and method of making

#340
20120126682
2012-05-24

Spark plug with ceramic electrode tip

#341
20120125279
2012-05-24

Pre-chamber spark plug with tubular electrode and method of manufacturing same

#342
20120112621
2012-05-10

Spark plug with undercut insulator and one piece shell

#343
20120112620
2012-05-10

Non-thermal plasma ignition arc suppression

#344
20120112619
2012-05-10

Spark plug and method of manufacturing the same

#345
20120104927
2012-05-03

Spark plug with undercut insulator

#346
20120086326
2012-04-12

Attaching a precious metal component to spark plug electrode and spark plug having the same

#347
20120080995
2012-04-05

Plasma jet ignition plug and manufacturing method thereof

#348
20120074828
2012-03-29

Spark plug and manufacturing method thereof

#349
20120068390
2012-03-22

Ceramic Spark Plug Insulator And Method Of Making

#350
20120062099
2012-03-15

Spark plug having a substantially columnar electrode tip welded to a component thereof

#351
20120062098
2012-03-15

Method of manufacturing a spark plug having electrode cage secured to the shell

#352
20120055018
2012-03-08

Insulator for spark plug, and method for manufacturing spark plug

#353
20120038262
2012-02-16

Composite ceramic electrode and ignition device therewith

#354
20120025690
2012-02-02

Spark plug and its method of production

#355
20120025689
2012-02-02

Prechamber spark plug

#356
20120019120
2012-01-26

Spark plug

#357
20120015578
2012-01-19

Method of manufacturing sparkplugs

#358
20120013240
2012-01-19

Ceramic electrode, ignition device therewith and methods of construction thereof

#359
20120001533
2012-01-05

Spark plug and its manufacturing method

#360
20120001532
2012-01-05

Manufacturing apparatus and manufacturing method for spark plugs

#361
20110316408
2011-12-29

Spark plug for internal combustion engine having a ground electrode with a protrusion having improved erosion resistance and method of manufacturing same

#362
20110304256
2011-12-15

Spark plug and manufacturing method thereof

#363
20110298164
2011-12-08

Method of assembling a small-diameter spark plug with resistive seal

#364
20110291543
2011-12-01

Igniter assembly including arcing reduction features

#365
20110279009
2011-11-17

Spark ignition device and ground electrode therefor and methods of construction thereof

#366
20110247579
2011-10-13

Igniter including a corona enhancing electrode tip

#367
20110241525
2011-10-06

High thread spark plug with undercut insulator

#368
20110241524
2011-10-06

Spark plug and manufacturing method thereof

#369
20110241522
2011-10-06

Spark ignition device for an internal combustion engine, metal shell therefor and methods of construction thereof

#370
20110241521
2011-10-06

SPARK PLUG ELECTRODE AND METHOD OF MANUFACTURE

#371
20110227472
2011-09-22

Spark plug and method for manufacturing a spark plug

#372
20110215703
2011-09-08

Pre-chamber spark plug

#373
20110210659
2011-09-01

Spark plug and manufacturing method therefor

#374
20110198983
2011-08-18

COMPOSITE PRODUCED FROM INTERMETALLIC PHASES AND METAL

#375
20110198982
2011-08-18

Spark plug and method of manufacturing the same

#376
20110193471
2011-08-11

Spark plug and manufacturing method therefor

#377
20110193470
2011-08-11

Spark plug and manufacturing method thereof

#378
20110193469
2011-08-11

Spark plug and method of manufacturing the same

#379
20110183573
2011-07-28

Method of manufacturing metal shell assembly for spark plug, method of manufacturing spark plug, and apparatus for manufacturing metal shell assembly for spark plug

#380
20110177744
2011-07-21

Method for producing a spark plug electrode

#381
20110148276
2011-06-23

Spark plug

#382
20110148275
2011-06-23

Spark plug and process for producing same

#383
20110133626
2011-06-09

Spark plug for internal combustion engine and method of manufacturing the same

#384
20110133625
2011-06-09

Spark plug and method of manufacturing the same

#385
20110121712
2011-05-26

Spark plug with volume-stable electrode material

#386
20110107588
2011-05-12

Method for affixing the insulator and the metallic shell of a spark plug

#387
20110077141
2011-03-31

Alumina ceramic for spark plug insulator

#388
20110057554
2011-03-10

Ignition Device Having a Reflowed Firing Tip and Method of Construction

#389
20110045731
2011-02-24

Method of producing a spark plug

#390
20110043094
2011-02-24

Spark plug, and method for manufacturing the same

#391
20110037373
2011-02-17

Plasma jet spark plug

#392
20110037370
2011-02-17

Spark plug including electrodes with low swelling rate and high corrosion resistance

#393
20110012499
2011-01-20

Spark plug center electrode with reduced cover portion thickness

#394
20110012498
2011-01-20

Spark plug including high temperature performance electrode

#395
20110005485
2011-01-13

INSULATOR FOR SPARK PLUG, PROCESS FOR PRODUCING THE INSULATOR, SPARK PLUG, AND PROCESS FOR PRODUCING THE SPARK PLUG

#396
20100320894
2010-12-23

SPARK PLUG HAVING LONG SERVICE LIFE

#397
20100320893
2010-12-23

Spark plug and method of manufacturing the same

#398
20100289398
2010-11-18

Method for producing spark plug and spark plug

#399
20100283373
2010-11-11

Spark plug

#400
20100275869
2010-11-04

Spark plug for internal combustion engine and method of manufacturing the same

#401
20100273385
2010-10-28

SPARK PLUG ELECTRODE AND PROCESS FOR MAKING

#402
20100264803
2010-10-21

Spark plug for internal combustion engine and method for manufacturing spark plug

#403
20100264802
2010-10-21

Spark plug and process for producing the spark plug

#404
20100264801
2010-10-21

SPARK PLUG AND PROCESS FOR PRODUCING THE SPARK PLUG

#405
20100259154
2010-10-14

Spark plug for internal combustion engine and manufacturing method thereof

#406
20100258541
2010-10-14

Method for welding tip of electrode in spark plug

#407
20100244651
2010-09-30

Spark ignition device with bridging ground electrode and method of construction thereof

#408
20100233929
2010-09-16

Method of manufacturing spark plug

#409
20100223973
2010-09-09

Method of producing metallic shell for spark plug

#410
20100213812
2010-08-26

Spark plug for internal combustion engines and method for manufacturing the spark plug

#411
20100203791
2010-08-12

Method for manufacturing spark plug

#412
20100201245
2010-08-12

Spark plug having a plastic upper insulator and method of construction

#413
20100187967
2010-07-29

Spark plug electrode and method of making

#414
20100164352
2010-07-01

Method of producing a spark plug via flared tip attachment

#415
20100148653
2010-06-17

Alumina-based sintered body for spark plug and method of manufacturing the same, and spark plug and method of manufacturing the same

#416
20100136867
2010-06-03

Spark plug and method for manufacturing spark plug

#417
20100133977
2010-06-03

Spark plug and manufacturing method thereof

#418
20100116794
2010-05-13

Method for manufacturing spark plug

#419
20100109502
2010-05-06

Spark plug manufacturing method, and spark plug

#420
20100101073
2010-04-29

Spark plug manufacturing method

#421
20100093246
2010-04-15

Deflection inspecting device for spark plug insulator, deflection inspecting method for spark plug insulator, and manufacturing method for spark plug insulator

#422
20100084391
2010-04-08

Spark plug, and its manufacturing method

#423
20100052500
2010-03-04

Spark plug and methods of construction thereof

#424
20100052499
2010-03-04

Composite ceramic electrode and ignition device therewith

#425
20100052497
2010-03-04

Ceramic electrode, ignition device therewith and methods of construction thereof

#426
20100048083
2010-02-25

METHOD OF MANUFACTURING SPARK PLUG

#427
20100044929
2010-02-25

METHOD OF FORMING A SPARK PLUG INSULATOR

#428
20100007260
2010-01-14

SPARK PLUG HAVING AN INSULATOR COMPOSED OF HIGH-PURITY ALUMINIUM OXIDE CERAMIC

#429
20090322198
2009-12-31

Method of producing a spark plug that has a high dimensional accuracy in the spark gap

#430
20090309476
2009-12-17

Method for applying a pin on an electrode base body

#431
20090309475
2009-12-17

Pre-chamber spark plug

#432
20090302733
2009-12-10

Spark plug for internal combustion engine

#433
20090293995
2009-12-03

Noble metal alloy for spark plug and method for producing and processing the same

#434
20090256461
2009-10-15

Ceramic spark plug insulator and method of making

#435
20090239437
2009-09-24

Method for manufacturing a spark plug insulator including steps for forming a through hole therein

#436
20090227169
2009-09-10

Manufacturing method for ignition plug involves removing leading end portion of shell extended from end surface of insulator

#437
20090227168
2009-09-10

Method for manufacturing ignition plug

#438
20090215348
2009-08-27

INSULATOR FOR SPARK PLUG, AND METHOD FOR MANUFACTURING SPARK PLUG

#439
20090189502
2009-07-30

Method of producing spark plug, and spark plug

#440
20090179544
2009-07-16

Spark plug with multi-layer firing tip

#441
20090140624
2009-06-04

Spark plug for internal combustion engine and method for producing the spark plug

#442
20090134764
2009-05-28

Spark plug for internal combustion engine having ground electrode with thick, thin and stepped portion and method for producing the spark plug

#443
20090127997
2009-05-21

Spark plug for internal combustion engine

#444
20090102345
2009-04-23

Spark plug having a metal fitting portion for holding an insulator at a portion opposite a tip end

#445
20090096344
2009-04-16

Sparkplug with precision gap

#446
20090072694
2009-03-19

Sparkplug having improved heat removal capabilities and method to recycle used sparkplugs

#447
20090071429
2009-03-19

Spark plug and internal combustion engine in which the spark plug is disposed

#448
20090066211
2009-03-12

Method for manufacturing a spark plug having a laterally oriented ground electrode

#449
20090033195
2009-02-05

Spark plug for internal combustion engine and method of manufacturing the same

#450
20090007618
2009-01-08

Apparatus and method of producing spark plug

#451
20080309214
2008-12-18

Spark plug and method for production of a spark plug

#452
20080284305
2008-11-20

Small-diameter spark plug with resistive seal

#453
20080238283
2008-10-02

Plasma jet spark plug and manufacturing method therefor

#454
20080238282
2008-10-02

Method for producing spark plug by projection welding and spark plug thereof

#455
20080203882
2008-08-28

Spark plug and method for manufacturing the same

#456
20080185948
2008-08-07

Spark plug electrode and process for making

#457
20080174222
2008-07-24

Ignition device having an induction welded and laser weld reinforced firing tip and method of construction

#458
20080174221
2008-07-24

Ignition device having an electrode with a platinum firing tip and method of construction

#459
20080079344
2008-04-03

Spark plug and method of securing the mutual positioning of the body of the ceramic insulator with through central electrode and the thermally and electrically conductive casing with lateral electrode of the spark plug

#460
20080074025
2008-03-27

Spark plug for internal combustion engine designed to keep ignitability of fuel high

#461
20080036353
2008-02-14

Ignition device having a reflowed firing tip and method of construction

#462
20080029053
2008-02-07

Spark plug having noble metal tip

#463
20080018216
2008-01-24

High power discharge fuel ignitor

#464
20070298245
2007-12-27

Alumina composite sintered body, evaluation method thereof and spark plug

#465
20070262721
2007-11-15

Composite spark plug

#466
20070236122
2007-10-11

Pre-chamber type spark plug

#467
20070228915
2007-10-04

Spark plug used for an internal-combustion engine and a method for manufacturing the same

#468
20070222351
2007-09-27

Spark plug

#469
20070216276
2007-09-20

Spark plug for internal combustion engine and related manufacturing method

#470
20070216275
2007-09-20

Spark plug for use in an internal-combustion engine with a bilayer ground electrode

#471
20070210688
2007-09-13

Spark plug having a rear-end portion of a threaded portion that has a higher hardness than a crimp portion and method of manufacturing the same

#472
20070188063
2007-08-16

Metallic insulator coating for high capacity spark plug

#473
20070132354
2007-06-14

Spark plugs and methods of making the same

#474
20070130751
2007-06-14

Method of forming a spark plug with multi-layer firing tip

#475
20070128964
2007-06-07

Spark plug with noble metal chip joined by unique laser welding and fabrication method thereof

#476
20070114900
2007-05-24

Spark plug with multi-layer firing tip

#477
20070114899
2007-05-24

Spark plug with multi-layer firing tip

#478
20070103046
2007-05-10

Spark plug having precious metal pad attached to ground electrode and method of making same

#479
20070101976
2007-05-10

Method for manufacturing an ignition coil and corresponding ignition coil

#480
20070091542
2007-04-26

Spark plug and method of manufacturing same

#481
20070080618
2007-04-12

Spark plug including ground electrode with arcuately curved face

#482
20070077846
2007-04-05

Method for manufacturing an ignition plug and ignition plug produced in that manner

#483
20070069618
2007-03-29

Spark plug with welded sleeve on electrode

#484
20070054581
2007-03-08

Method for regulating aground electrode position in spark plug

#485
20070046162
2007-03-01

Spark plug

#486
20070040487
2007-02-22

Spark plug

#487
20060276097
2006-12-07

Method for securing a metal noble tip to an electrode of a spark plug using a resistance and laser welding process

#488
20060267469
2006-11-30

Dual-spark pre-chambered spark igniter

#489
20060246807
2006-11-02

Spark plug manufacturing apparatus and method of manufacturing spark plug

#490
20060238092
2006-10-26

Spark plug and method for manufacturing the spark plug

#491
20060223406
2006-10-05

Method and device for manufacturing a noble metal armored electrode for a sparking plug

#492
20060220510
2006-10-05

Spark plug with excellent impact resistance conductive seal, and method for producing the same

#493
20060165554
2006-07-27

Iridium alloy

#494
20060163992
2006-07-27

Spark plug for internal combustion engine

#495
20060158082
2006-07-20

Spark plug with specific electrode material

#496
20060158081
2006-07-20

Spark plug

#497
20060103284
2006-05-18

Spark plug with ground electrode having mechanically locked precious metal feature

#498
20060103283
2006-05-18

Spark plug and method for producing it

#499
20060099872
2006-05-11

Method of making a spark plug having a multi-tiered center wire assembly

#500
20060028106
2006-02-09

Ignition device having a reflowed firing tip and method of making

#501
20050271263
2005-12-08

Method of detecting protrudent adhered matters and method of making spark plug using the same

#502
20050242695
2005-11-03

Spark plug having a specific structure of noble metal tip on ground electrode

#503
20050227567
2005-10-13

Method for manufacturing a spark plug with glaze coating

#504
20050215160
2005-09-29

Higher-performance spark plug and ramrod engine ignition system using piezo-electric enhancement components

#505
20050208862
2005-09-22

Low cost spark plug manufactured from conductive loaded resin-based materials

#506
20050200255
2005-09-15

Spark plug having a noble-metal chip and method for manufacturing the same

#507
20050176332
2005-08-11

Method for producing a spark plug electrode

#508
20050174026
2005-08-11

Spark plug with sealing ring around center electrode

#509
20050174025
2005-08-11

Spark plug designed to ensure high strength of electrode joint and production method thereof

#510
20050122024
2005-06-09

Sealing device and sealing method

#511
20050093414
2005-05-05

Glass sealed spark plug assembly

#512
20050093413
2005-05-05

Spark plug with ground electrode having mechanically locked precious metal feature

#513
20050093412
2005-05-05

Spark plug center electrode assembly

#514
20050093411
2005-05-05

Spark plug having a multi-tiered center wire assembly

#515
20050077807
2005-04-14

Spark plug having a specific structure of noble metal tip on ground electrode

#516
20050062386
2005-03-24

Spark plug including ground elcetrode carrier casing

#517
20050057133
2005-03-17

Spark plug and related manufacturing method

#518
20050052106
2005-03-10

Noble metal tip for spark plug electrode and method of making same

#519
20050042965
2005-02-24

Method for manufacturing spark plug using bending process for earth electrode

#520
20050039332
2005-02-24

Method for manufacturing spark plug

#521
20050023949
2005-02-03

Spark plug with noble metal chip joined by unique laser welding and fabrication method thereof

#522
18751910
2025-07-29

Spark plug electrode and spark plug

#523
18743823
2025-01-07

Spark plug with cooling features and method of manufacturing the same

#524
17874786
2023-12-05

Spark plug electrode with electrode tip directly thermally coupled to heat dissipating core and method of manufacturing the same

#525
17576566
2023-04-04

Spark plug electrode and method of manufacturing the same

#526
16848289
2020-09-15

Spark plug

#527
16843977
2020-07-14

Spark plug

#528
16843200
2020-07-14

Spark plug

#529
16218934
2020-04-14

Corona ignition assembly including a high voltage connection and method of manufacturing the corona ignition assembly

#530
16025210
2019-11-05

Ground electrode assembly for a spark plug

#531
15974889
2018-10-16

Method of manufacturing spark plug

#532
15865788
2018-07-24

Spark plug

#533
15715349
2018-05-08

Method for manufacturing spark plug

#534
15658617
2018-03-27

Spark plug gapping tool