G03G 2215/021
By contact, friction or induction
Official title: by contact, friction or induction
G03G2215/021 (By contact, friction or induction) appears on 477 US grants and 306 published applications in this corpus.
Search patents in G03G- Granted patents
- 477
- Published applications
- 306
- Assignees
- 49
- Inventors
- 879
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 4 | 0 |
| 1995 | 11 | 0 |
| 1996 | 13 | 0 |
| 1997 | 22 | 0 |
| 1998 | 30 | 0 |
| 1999 | 30 | 0 |
| 2000 | 27 | 0 |
| 2001 | 33 | 19 |
| 2002 | 36 | 31 |
| 2003 | 32 | 20 |
| 2004 | 14 | 14 |
| 2005 | 11 | 11 |
| 2006 | 9 | 8 |
| 2007 | 9 | 22 |
| 2008 | 9 | 26 |
| 2009 | 16 | 14 |
| 2010 | 23 | 12 |
| 2011 | 12 | 7 |
| 2012 | 16 | 8 |
| 2013 | 4 | 2 |
| 2014 | 6 | 1 |
| 2015 | 3 | 4 |
| 2016 | 4 | 3 |
| 2017 | 9 | 7 |
| 2018 | 5 | 17 |
| 2019 | 17 | 10 |
| 2020 | 13 | 15 |
| 2021 | 7 | 4 |
| 2022 | 5 | 3 |
| 2023 | 2 | 17 |
| 2024 | 12 | 19 |
| 2025 | 21 | 8 |
| 2026 | 5 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Image-forming apparatus generating electrical discharge upstream of transfer portion22 Sep 2026US 12,743,041 B2Canon Kabushiki Kaisha
- Image forming apparatus15 Sep 2026US 12,736,891 B2KYOCERA Document Solutions Inc.
- Image forming apparatus18 Aug 2026US 12,710,705 B2Canon Kabushiki Kaisha
- Developing cartridge including electrical contact surface positioned away from developing roller11 Aug 2026US 12,704,800 B2Brother Kogyo Kabushiki Kaisha
- Image forming apparatus having charging voltage and developing voltage stepwise control16 Jun 2026US 12,656,704 B2Canon Kabushiki Kaisha
- Image forming unit, process cartridge, and image forming apparatus23 Jul 2026US 2026/0211353 A1FUJIFILM Business Innovation Corp.
- Image forming apparatus14 May 2026US 2026/0133520 A1FUJIFILM Business Innovation Corp.
- Charging roller, process cartridge, image forming apparatus, and image forming method8 Jan 2026US 2026/0010090 A1KYOCERA Document Solutions Inc.
- Image forming apparatus8 Jan 2026US 2026/0010092 A1Canon Kabushiki Kaisha
- Image forming apparatus11 Dec 2025US 2025/0377605 A1KYOCERA Document Solutions Inc.
Most cited
By later US patents
- Electrophotographic image forming apparatus to which a process cartridge is detachably mountable and process cartridge comprising cartridge drum positioning portion or recess242US 6,608,980 B2Canon Kabushiki Kaisha · 2003
- Process cartridge, method for assembling process cartridge and image forming appararatus167US 5,500,714 ACanon Kabushiki Kaisha · 1996
- Process cartridge remanufacturing method145US 6,931,226 B2Canon Kabushiki Kaisha · 2005
- Process cartridge, method for assembling process cartridge and image forming apparatus138US 5,543,898 ACanon Kabushiki Kaisha · 1996
- Process cartridge and image forming apparatus having particular arrangement of electrical contacts128US 6,128,452 ACanon Kabushiki Kaisha · 2000