G03G 15/0208
By contact, friction or induction
Official title: {by contact, friction or induction, e.g. liquid charging apparatus}
G03G15/0208 (By contact, friction or induction) appears on 1,750 US grants and 1,487 published applications in this corpus.
Search patents in G03G- Granted patents
- 1,750
- Published applications
- 1,487
- Assignees
- 155
- Inventors
- 2,514
- 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 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 7 | 0 |
| 1992 | 15 | 0 |
| 1993 | 14 | 0 |
| 1994 | 24 | 0 |
| 1995 | 46 | 0 |
| 1996 | 59 | 0 |
| 1997 | 55 | 0 |
| 1998 | 59 | 0 |
| 1999 | 46 | 0 |
| 2000 | 53 | 0 |
| 2001 | 40 | 19 |
| 2002 | 40 | 51 |
| 2003 | 47 | 50 |
| 2004 | 39 | 39 |
| 2005 | 36 | 33 |
| 2006 | 32 | 43 |
| 2007 | 30 | 71 |
| 2008 | 23 | 61 |
| 2009 | 43 | 46 |
| 2010 | 55 | 49 |
| 2011 | 48 | 63 |
| 2012 | 49 | 78 |
| 2013 | 62 | 61 |
| 2014 | 70 | 61 |
| 2015 | 67 | 71 |
| 2016 | 62 | 65 |
| 2017 | 69 | 75 |
| 2018 | 79 | 97 |
| 2019 | 111 | 80 |
| 2020 | 82 | 72 |
| 2021 | 55 | 53 |
| 2022 | 48 | 49 |
| 2023 | 36 | 51 |
| 2024 | 43 | 62 |
| 2025 | 48 | 47 |
| 2026 | 31 | 40 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Charging roll22 Sep 2026US 12,743,037 B2Synztec Co., Ltd.
- Image forming apparatus that charges an image bearing member using a voltage set according to an environmental temperature22 Sep 2026US 12,743,038 B2Canon Kabushiki Kaisha
- 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.
- Recording material estimation method, information processing apparatus, and consumable8 Sep 2026US 12,730,404 B2Zhuhai Pantum Electronics Co., Ltd.
- Electrophotographic member, transfer device, charging device, and image forming apparatus17 Sep 2026US 2026/0277138 A1FUJIFILM Business Innovation Corp.
- Electrophotographic photoreceptor, process cartridge, and image forming apparatus10 Sep 2026US 2026/0267244 A1KYOCERA Document Solutions Inc.
- Charging-member cleaner, image forming apparatus, and process cartridge10 Sep 2026US 2026/0267252 A1
- Electrophotographic image forming apparatus, process cartridge, and image forming method10 Sep 2026US 2026/0267253 A1Canon Kabushiki Kaisha
- Charging roller, process cartridge, and electrophotographic image forming apparatus10 Sep 2026US 2026/0267254 A1Canon Kabushiki Kaisha
Most cited
By later US patents
- Image forming apparatus with a contact member contacting an image carrier301US 5,585,896 ARicoh Company, Ltd. · 1996
- Space securing member, developing device, charging device and process cartridge201US 6,385,416 B1Canon Kabushiki Kaisha · 2002
- Charging device135US 4,851,960 ACanon Kabushiki Kaisha · 1989
- Image forming apparatus rotationally driving image bearing member and contact electrifying member of process cartridge and process cartridge comprising image bearing member and contact electrifying member120US 6,714,746 B2Canon Kabushiki Kaisha · 2004
- Electric contact member applying voltage to charger, process cartridge, and image forming apparatus119US 6,954,600 B2Canon Kabushiki Kaisha · 2005