G03G 21/1857
For transmitting mechanical drive power to the process cartridge, drive mechanisms, gears
Official title: {for transmitting mechanical drive power to the process cartridge, drive mechanisms, gears, couplings, braking mechanisms}
G03G21/1857 (For transmitting mechanical drive power to the process cartridge, drive mechanisms, gears) appears on 1,276 US grants and 1,207 published applications in this corpus.
Search patents in G03G- Granted patents
- 1,276
- Published applications
- 1,207
- Assignees
- 97
- Inventors
- 1,037
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 6 | 0 |
| 1994 | 4 | 0 |
| 1995 | 7 | 0 |
| 1996 | 5 | 0 |
| 1997 | 8 | 0 |
| 1998 | 5 | 0 |
| 1999 | 15 | 0 |
| 2000 | 15 | 0 |
| 2001 | 18 | 5 |
| 2002 | 19 | 16 |
| 2003 | 5 | 9 |
| 2004 | 9 | 7 |
| 2005 | 14 | 10 |
| 2006 | 12 | 29 |
| 2007 | 16 | 24 |
| 2008 | 18 | 29 |
| 2009 | 19 | 36 |
| 2010 | 20 | 23 |
| 2011 | 30 | 34 |
| 2012 | 32 | 46 |
| 2013 | 44 | 47 |
| 2014 | 53 | 59 |
| 2015 | 64 | 61 |
| 2016 | 57 | 53 |
| 2017 | 75 | 90 |
| 2018 | 81 | 85 |
| 2019 | 83 | 72 |
| 2020 | 90 | 111 |
| 2021 | 119 | 87 |
| 2022 | 95 | 58 |
| 2023 | 68 | 68 |
| 2024 | 63 | 60 |
| 2025 | 53 | 59 |
| 2026 | 29 | 29 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Developing cartridge6 Oct 2026US 12,754,494 B2Brother Kogyo Kabushiki Kaisha
- Cartridge and image forming apparatus6 Oct 2026US 12,754,510 B2Canon Kabushiki Kaisha
- Cartridge, attachment and mounting kit29 Sep 2026US 12,748,372 B2Canon Kabushiki Kaisha
- Attachments to provide an aligning force15 Sep 2026US 12,736,914 B2Hewlett-Packard Development Company, L. P.
- Developing cartridge including shaft and cam having cam surface25 Aug 2026US 12,717,269 B2Brother Kogyo Kabushiki Kaisha
- Electrophotographic image forming apparatus, cartridge and drum unit1 Oct 2026US 2026/0299509 A1Canon Kabushiki Kaisha
- Developing cartridge including movable shaft, and cam provided on shaft and having surface inclined relative thereto24 Sep 2026US 2026/0288055 A1Brother Kogyo Kabushiki Kaisha
- Developing cartridge including developing roller and coupling17 Sep 2026US 2026/0277153 A1Brother Kogyo Kabushiki Kaisha
- Process cartridge3 Sep 2026US 2026/0259524 A1Zhuhai Dinghui Technology Co., Ltd.
- Image forming apparatus27 Aug 2026US 2026/0252010 A1
Most cited
By later US patents
- Process cartridge, electrophotographic image forming apparatus, driving force transmission part, and electrophotographic photosensitive drum289US 5,903,803 ACanon Kabushiki Kaisha · 1999
- Image forming apparatus, process cartridge mountable within it and method for attaching photosensitive drum to process cartridge262US 5,331,373 ACanon Kabushiki Kaisha · 1994
- Process cartridge and electrophotographic image forming apparatus255US 5,920,753 ACanon Kabushiki Kaisha · 1999
- Image forming apparatus, process cartridge mountable within it and method for attaching photosensitive drum to process cartridge245US 5,452,056 ACanon Kabushiki Kaisha · 1995
- Process cartridge, electrophotographic image forming apparatus and fixing method of electrical contact part229US 6,934,485 B2Canon Kabushiki Kaisha · 2005