| Patents for H01T 13 - Sparking plugs (7,441) |
|---|
| 02/22/1977 | US4008944 Glow plug connector |
| 02/15/1977 | US4007714 Spark plug and rotary engine combination |
| 02/15/1977 | US4007713 Test circuit |
| 02/08/1977 | US4007391 Igniters |
| 02/01/1977 | US4006106 Self sealable glassy resistor composition for a resistor sealed spark plug |
| 01/25/1977 | US4005050 Tantalum or niobium-modified resistor element |
| 01/25/1977 | US4004562 Multiple air gap spark plug having resistive electrode coupling |
| 01/18/1977 | US4004213 Spark gap detector |
| 01/18/1977 | US4004183 Resistor built-in spark plug |
| 01/18/1977 | US4003120 Captive type spark plug gasket and tool for installing same |
| 01/04/1977 | US4001145 Glassy resistor composition for use in a resistor incorporated spark plug |
| 12/28/1976 | US3999530 Internal combustion spark ignition engine |
| 12/21/1976 | US3998663 Nickel-oxygen melt, casting, destroying eutectic structure, dispersing nickel oxide |
| 12/07/1976 | US3995929 Female terminal |
| 11/30/1976 | US3995184 Alumina-spinel diffusion semiconductor |
| 11/30/1976 | US3995183 Spark gap component for use in ignition systems of internal combustion engines |
| 10/26/1976 | US3988646 Ignition devices |
| 10/26/1976 | US3987758 Radial piston engine |
| 10/05/1976 | US3984717 Spark plug |
| 09/14/1976 | US3980067 Primer valve for model engines |
| 08/10/1976 | US3974412 Spark plug employing both corona discharge and arc discharge and a system employing the same |
| 07/20/1976 | US3970885 Ignition plug for internal combustion engines |
| 07/20/1976 | US3970591 Electrical discharge device comprising an insulator body having an electrically semi-conducting coating formed thereon |
| 07/20/1976 | US3970053 Internal combustion engines |
| 07/06/1976 | US3968303 Beryllium oxide |
| 07/06/1976 | US3968057 Silicon carbide, alumina, fatty acid |
| 06/29/1976 | US3967230 Resistor built-in spark plug |
| 06/29/1976 | US3967149 Spark plug |
| 06/29/1976 | US3965879 Radio frequency interference suppression apparatus |
| 06/22/1976 | US3965384 Ignition plug for use in internal combustion engines |
| 05/25/1976 | US3959725 Distributor voltage sensor |
| 05/25/1976 | US3959184 Ceramic of copper oxide-alumina-group ii a oxide |
| 05/18/1976 | US3958144 Spark plug |
| 05/11/1976 | US3956664 Multiple air gap spark plug |
| 04/06/1976 | US3948532 Captive type sparkplug gasket |
| 03/30/1976 | US3947280 Alumina, strontium oxide |
| 03/02/1976 | US3940987 Apparatus for measuring the temperature of an operating spark plug |
| 02/24/1976 | US3940649 Spark plug construction |
| 02/10/1976 | US3937185 Staggered configuration for wankel engine spark plugs |
| 01/20/1976 | US3933134 Method and apparatus using proportional residual gas storage to reduce NOx emissions from internal combustion engines |
| 01/06/1976 | US3931055 Electrically conducting ceramic to metal seal, particularly for sparkplugs and method of its manufacture |