G03G 2215/0891
Optical detection
G03G2215/0891 (Optical detection) appears on 186 US grants and 138 published applications in this corpus.
Search patents in G03G- Granted patents
- 186
- Published applications
- 138
- Assignees
- 40
- Inventors
- 329
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 7 | 0 |
| 1997 | 8 | 0 |
| 1998 | 6 | 0 |
| 1999 | 7 | 0 |
| 2000 | 13 | 0 |
| 2001 | 3 | 4 |
| 2002 | 7 | 4 |
| 2003 | 5 | 1 |
| 2004 | 0 | 2 |
| 2005 | 2 | 7 |
| 2006 | 4 | 11 |
| 2007 | 6 | 5 |
| 2008 | 4 | 13 |
| 2009 | 5 | 8 |
| 2010 | 7 | 4 |
| 2011 | 7 | 8 |
| 2012 | 11 | 8 |
| 2013 | 6 | 3 |
| 2014 | 10 | 8 |
| 2015 | 9 | 2 |
| 2016 | 3 | 5 |
| 2017 | 11 | 10 |
| 2018 | 3 | 3 |
| 2019 | 7 | 5 |
| 2020 | 1 | 3 |
| 2021 | 8 | 7 |
| 2022 | 3 | 5 |
| 2023 | 3 | 1 |
| 2024 | 4 | 6 |
| 2025 | 5 | 3 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Image forming apparatus including toner conveyance detection portion detecting toner conveyance error in toner conveyance29 Sep 2026US 12,748,364 B2KYOCERA Document Solutions Inc.
- Image forming apparatus that sets a target temperature based on a developer amount in a developer storage portion3 Mar 2026US 12,566,394 B2Canon Kabushiki Kaisha
- Image forming apparatus having detection of stored toner amount18 Nov 2025US 12,474,652 B2Canon Kabushiki Kaisha
- Image forming apparatus and image forming system with display of remaining toner amount30 Sep 2025US 12,429,797 B2Canon Kabushiki Kaisha
- Image forming apparatus9 Sep 2025US 12,411,432 B2Canon Kabushiki Kaisha
- Image forming apparatus4 Jun 2026US 2026/0153820 A1Canon Kabushiki Kaisha
- Image forming apparatus7 May 2026US 2026/0126740 A1Canon Kabushiki Kaisha
- Cleaning device and image forming apparatus28 Aug 2025US 2025/0271805 A1KYOCERA Document Solutions Inc.
- Image forming apparatus21 Aug 2025US 2025/0264825 A1KYOCERA Document Solutions Inc.
- Image forming apparatus27 Feb 2025US 2025/0068117 A1Canon Kabushiki Kaisha
Most cited
By later US patents
- Developer feeding member, developing apparatus, process cartridge and developer feeding member mounting method184US 7,224,925 B2Canon Kabushiki Kaisha · 2007
- Developer feeding member, developing apparatus, process cartridge and developer feeding member mounting method169US 7,349,657 B2Canon Kabushiki Kaisha · 2008
- Developing cartridge157US 6,072,969 ACanon Kabushiki Kaisha · 2000
- Developer feeding member, developing apparatus, process cartridge and developer feeding member mounting method102US 7,412,193 B2Canon Kabushiki Kaisha · 2008
- Shutter, developing cartridge and electrophotographic image forming apparatus88US 6,032,002 ACanon Kabushiki Kaisha · 2000