H01T 21/04
Cleaning
Official title: Cleaning (means for self-cleaning H01T13/14; abrasive blasting devices for cleaning sparking-plugs B24C3/34)
H01T21/04 (Cleaning) appears on 7 US grants and 3 published applications in this corpus.
Search patents in H01T- Granted patents
- 7
- Published applications
- 3
- Assignees
- 5
- Inventors
- 11
- Latest grant
- 11 Mar 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 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 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 1 | 0 |
| 2016 | 1 | 0 |
| 2017 | 1 | 0 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Pretreatment method for pretreating components prior to electroplating11 Mar 2025US 12,249,810 B2Robert Bosch GmbH
- Method for manufacturing spark plug8 May 2018US 9,966,737 B1Ngk Spark Plug Co., Ltd.
- Method and device for cleaning of ionizing electrodes25 Apr 2017US 9,630,185 B1
- Method for coating spark plug threads with a polytetrafluoroethylene mixutre5 Jan 2016US 9,231,384 B2
- Assembly of spark plug and engine main body10 Nov 2015US 9,181,918 B2Denso Corporation
- Pretreatment method for pretreating components prior to electroplating16 Jun 2022US 2022/0190562 A1Robert Bosch GmbH
- Method for coating spark plug threads with a polytetrafluoroethylene mixture7 Aug 2014US 2014/0220234 A1
- Assembly of spark plug and engine main body25 Apr 2013US 2013/0098324 A1Denso Corporation
Most cited
By later US patents
- Method and device for cleaning of ionizing electrodes11US 9,630,185 B12017
- Current controlled inductor7US 4,825,184 AThe Boeing Company · 1989
- Spark plug cleaner4US 4,062,155 AWells Manufacturing Corporation · 1977
- Assembly of spark plug and engine main body1US 9,181,918 B2Denso Corporation · 2015
- Method for manufacturing spark plug1US 9,966,737 B1Ngk Spark Plug Co., Ltd. · 2018