G03G 15/09
Using magnetic brush
Official title: using magnetic brush
G03G15/09 (Using magnetic brush) appears on 1,993 US grants and 1,049 published applications in this corpus.
Search patents in G03G- Granted patents
- 1,993
- Published applications
- 1,049
- Assignees
- 192
- Inventors
- 2,764
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 35 | 0 |
| 1977 | 29 | 0 |
| 1978 | 33 | 0 |
| 1979 | 18 | 0 |
| 1980 | 28 | 0 |
| 1981 | 46 | 0 |
| 1982 | 39 | 0 |
| 1983 | 41 | 0 |
| 1984 | 50 | 0 |
| 1985 | 46 | 0 |
| 1986 | 55 | 0 |
| 1987 | 53 | 0 |
| 1988 | 25 | 0 |
| 1989 | 49 | 0 |
| 1990 | 44 | 0 |
| 1991 | 61 | 0 |
| 1992 | 42 | 0 |
| 1993 | 41 | 0 |
| 1994 | 33 | 0 |
| 1995 | 32 | 0 |
| 1996 | 53 | 0 |
| 1997 | 38 | 0 |
| 1998 | 56 | 0 |
| 1999 | 46 | 0 |
| 2000 | 53 | 0 |
| 2001 | 29 | 14 |
| 2002 | 38 | 43 |
| 2003 | 26 | 40 |
| 2004 | 39 | 50 |
| 2005 | 33 | 33 |
| 2006 | 30 | 56 |
| 2007 | 33 | 49 |
| 2008 | 38 | 54 |
| 2009 | 32 | 56 |
| 2010 | 41 | 39 |
| 2011 | 48 | 43 |
| 2012 | 41 | 45 |
| 2013 | 45 | 66 |
| 2014 | 59 | 35 |
| 2015 | 75 | 65 |
| 2016 | 53 | 44 |
| 2017 | 38 | 52 |
| 2018 | 43 | 37 |
| 2019 | 47 | 35 |
| 2020 | 34 | 29 |
| 2021 | 25 | 32 |
| 2022 | 30 | 27 |
| 2023 | 22 | 24 |
| 2024 | 22 | 21 |
| 2025 | 15 | 30 |
| 2026 | 11 | 30 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Magnet roller, developing roller, and image forming apparatus1 Sep 2026US 12,724,363 B2KYOCERA Document Solutions Inc.
- Developing device18 Aug 2026US 12,710,706 B2Canon Kabushiki Kaisha
- Developing device18 Aug 2026US 12,710,710 B2Canon Kabushiki Kaisha
- Magnet including a non-rotatable shaft engaged with a through hole at a lateral end21 Jul 2026US 12,687,800 B2Ricoh Company, Ltd.
- Development apparatus19 May 2026US 12,631,990 B2Canon Kabushiki Kaisha
- Image forming apparatus24 Sep 2026US 2026/0288036 A1KYOCERA Document Solutions Inc.
- Developing device and image forming apparatus17 Sep 2026US 2026/0277137 A1Ricoh Company, Ltd.
- Development apparatus3 Sep 2026US 2026/0259521 A1Canon Kabushiki Kaisha
- Developer carrying member and method for manufacturing the same27 Aug 2026US 2026/0252001 A1KYOCERA Document Solutions Inc.
- Image forming apparatus6 Aug 2026US 2026/0227722 A1KYOCERA Document Solutions Inc.
Most cited
By later US patents
- Process cartridge, engaging member therefor and method for mounting developing roller and magnet196US 6,549,736 B2Canon Kabushiki Kaisha · 2003
- Developing apparatus with drive mechanism for developer bearing body183US 6,173,145 B2Canon Kabushiki Kaisha · 2001
- Electrode member, developing apparatus, process cartridge and image forming apparatus161US 5,768,658 ACanon Kabushiki Kaisha · 1998
- Developing apparatus, process cartridge, and electrophotographic image forming apparatus including an elastic member preventing a gap between a developing agent carrier and a layer thickness limiter from changing, and an electrophotographic image forming apparatus detachably mounting such process cartridge125US 6,978,099 B2Canon Kabushiki Kaisha · 2005
- Image forming apparatus and developing device with improved self toner density control118US 6,337,957 B12002