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Class Information
Number: 313/136
Name: Electric lamp and discharge devices > Spark plugs > Plural part center electrode lead-in
Description: Subject matter in which the portion of the center electrode which is encased by the insulating core structure consists of more than one part.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6885137 |
Spark plug and its manufacturing method |
Apr. 26, 2005 |
| 6833658 |
Middle electrode with precious metal reinforcement and a process for producing the same |
Dec. 21, 2004 |
| 6791246 |
Spark plug and method for its manufacture |
Sep. 14, 2004 |
| 6680561 |
Spark plug |
Jan. 20, 2004 |
| 6628051 |
Spark plug for an internal combustion engine |
Sep. 30, 2003 |
| 6583537 |
Spark plug with built-in resistor |
Jun. 24, 2003 |
| 6559578 |
Spark plug for an internal combustion engine |
May. 6, 2003 |
| 6320317 |
Glass seal resistor composition and resistor spark plugs |
Nov. 20, 2001 |
| 6265816 |
Spark plug, insulator for spark plug and process for fabricating the insulator |
Jul. 24, 2001 |
| 6160342 |
Resistor-incorporated spark plug and manufacturing method of resistor-incorporated spark plug |
Dec. 12, 2000 |
| 6069434 |
Manufacture and method of assembly for a spark electrode |
May. 30, 2000 |
| 5998913 |
Spark plug with iridium-rhodium alloy discharge portion |
Dec. 7, 1999 |
| 5952770 |
Spark plug for internal combustion engine |
Sep. 14, 1999 |
| 5936331 |
Electrode assembly structure |
Aug. 10, 1999 |
| RE35429 |
Spark plug and the method of manufacturing the same |
Jan. 21, 1997 |
| 5569971 |
Readily assembled spark electrode |
Oct. 29, 1996 |
| 5565730 |
Electrically conducting sealing compound for spark plugs |
Oct. 15, 1996 |
| 5514929 |
Spark plug including a ground electrode, a center electrode, and a resistor |
May. 7, 1996 |
| 5510668 |
Spark gap with low breakdown voltage jitter |
Apr. 23, 1996 |
| 5310373 |
Method for producing electrodes for spark plugs and spark plug electrodes |
May. 10, 1994 |
| 5304894 |
Metallized glass seal resistor composition |
Apr. 19, 1994 |
| 5283499 |
Igniter and cable connector assembly |
Feb. 1, 1994 |
| 5210458 |
Spark plug |
May. 11, 1993 |
| 5172025 |
Glass sealant of spark plug insulator for use in an internal combustion engine |
Dec. 15, 1992 |
| 5095242 |
Low radio interference spark plug |
Mar. 10, 1992 |
| 5008584 |
Spark plug having a built-in resistor for suppressing noise signals |
Apr. 16, 1991 |
| 4972812 |
Spark plug thermal control |
Nov. 27, 1990 |
| 4939409 |
Spark plug with a surface discharge section |
Jul. 3, 1990 |
| 4910428 |
Electrical-erosion resistant electrode |
Mar. 20, 1990 |
| 4893051 |
Spark plug and the method of manufacturing the same |
Jan. 9, 1990 |
| 4810929 |
Spark plug temperature control |
Mar. 7, 1989 |
| 4795944 |
Metallized glass seal resistor composition |
Jan. 3, 1989 |
| 4771210 |
Spark plug with electrodes having noble metal inserts |
Sep. 13, 1988 |
| 4695759 |
Method for producing a composite center electrode and an electrode |
Sep. 22, 1987 |
| 4613789 |
Spark plug with capacitor spark discharge |
Sep. 23, 1986 |
| 4465952 |
Spark plug for internal combustion engines |
Aug. 14, 1984 |
| 4460847 |
Spark plug |
Jul. 17, 1984 |
| 4427915 |
Spark plug and the process for production thereof |
Jan. 24, 1984 |
| 4414483 |
Spark plug and manufacturing process thereof |
Nov. 8, 1983 |
| 4406968 |
Sparkplug for internal combustion engine |
Sep. 27, 1983 |
| 4393324 |
Spark plug with a sphere-like metal center electrode and manufacturing process thereof |
Jul. 12, 1983 |
| 4345179 |
Resistor glass seal spark plug |
Aug. 17, 1982 |
| 4308487 |
Dual internal electric spark plug |
Dec. 29, 1981 |
| 4275559 |
Retractable igniter device for gas turbines |
Jun. 30, 1981 |
| 4249103 |
Breech-assembled igniter device |
Feb. 3, 1981 |
| 4082976 |
Spark plug design having two electrically isolated center electrodes |
Apr. 4, 1978 |
| 3995184 |
Alumina-spinel diffusion semiconductor |
Nov. 30, 1976 |
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