H01T 13/48
Sparking plugs: having means for rendering sparks visible
Official title: having means for rendering sparks visible
H01T13/48 (Sparking plugs: having means for rendering sparks visible) appears on 15 US grants and 4 published applications in this corpus.
Search patents in H01T- Granted patents
- 15
- Published applications
- 4
- Assignees
- 7
- Inventors
- 34
- Latest grant
- 18 Apr 2017
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 7 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Observation plug and spark observation system18 Apr 2017US 9,627,858 B2Imagineering, Inc.
- Spark plug with optical sensor13 Apr 2010US 7,696,679 B2Kistler Holding AG
- Optical sensor that measures the light output by the combustion chamber of an internal combustion engine4 Apr 2006US 7,022,968 B1National Semiconductor Corporation
- Ignition system monitoring assembly4 Nov 2003US 6,642,718 B2Siemens Westinghouse Power Corporation
- Sparking voltage detecting device for internal combustion engines31 May 1994US 5,317,268 AHonda Giken Kogyo Kabushiki Kaisha
- Observation plug and spark observation system27 Sep 2012US 2012/0242982 A1Imagineering, Inc.
- Spark Plug With Optical Sensor4 Sep 2008US 2008/0211373 A1Kistler Holding AG
- Light transmitting sparkplug5 Jul 2007US 2007/0152557 A1
- Ignition system monitoring assembly27 Mar 2003US 2003/0057951 A1Siemens Westinghouse Power Corporation
Most cited
By later US patents
- Combination gas oxygen concentration and combustion light sensor23US 4,419,212 ARobert Bosch GmbH · 1983
- Optical combustion event sensor structure particularly knock sensor for an internal combustion engine22US 4,446,723 ARobert Bosch GmbH · 1984
- Combustion monitoring system for multi-cylinder internal combustion engine16US 4,425,788 ARobert Bosch GmbH · 1984
- Combustion process parameter sensor14US 4,413,509 ARobert Bosch GmbH · 1983
- Combustion process observation element construction13US 4,422,323 ARobert Bosch GmbH · 1983