G03G 2215/0888
Arrangements for detecting toner level or concentration in the developing device
G03G2215/0888 (Arrangements for detecting toner level or concentration in the developing device) appears on 432 US grants and 395 published applications in this corpus.
Search patents in G03G- Granted patents
- 432
- Published applications
- 395
- Assignees
- 65
- Inventors
- 860
- 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 | 9 | 0 |
| 1998 | 9 | 0 |
| 1999 | 10 | 0 |
| 2000 | 18 | 0 |
| 2001 | 8 | 8 |
| 2002 | 14 | 12 |
| 2003 | 10 | 9 |
| 2004 | 11 | 4 |
| 2005 | 8 | 23 |
| 2006 | 13 | 19 |
| 2007 | 11 | 27 |
| 2008 | 9 | 39 |
| 2009 | 19 | 36 |
| 2010 | 33 | 16 |
| 2011 | 25 | 20 |
| 2012 | 25 | 17 |
| 2013 | 18 | 9 |
| 2014 | 19 | 15 |
| 2015 | 17 | 7 |
| 2016 | 16 | 18 |
| 2017 | 19 | 18 |
| 2018 | 10 | 12 |
| 2019 | 19 | 12 |
| 2020 | 10 | 9 |
| 2021 | 15 | 17 |
| 2022 | 6 | 13 |
| 2023 | 10 | 9 |
| 2024 | 11 | 11 |
| 2025 | 10 | 10 |
| 2026 | 4 | 5 |
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 apparatus15 Sep 2026US 12,736,894 B2Canon Kabushiki Kaisha
- 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 movable shutters for opening and closing toner inlets and outlets20 Jan 2026US 12,529,976 B2Brother Kogyo Kabushiki Kaisha
- Image forming apparatus having detection of stored toner amount18 Nov 2025US 12,474,652 B2Canon Kabushiki Kaisha
- Developing device and image forming apparatus9 Jul 2026US 2026/0194838 A1FUJIFILM Business Innovation Corp.
- Image forming apparatus4 Jun 2026US 2026/0153820 A1Canon Kabushiki Kaisha
- Image forming apparatus having movable shutters for opening and closing toner inlets and outlets7 May 2026US 2026/0126736 A1Brother Kogyo Kabushiki Kaisha
- Image forming apparatus7 May 2026US 2026/0126740 A1Canon Kabushiki Kaisha
- Toner container having a magnet for toner level sensing12 Feb 2026US 2026/0044095 A1Lexmark International, Inc.
Most cited
By later US patents
- Process cartridge, electrophotographic image forming apparatus and fixing method of electrical contact part229US 6,934,485 B2Canon Kabushiki Kaisha · 2005
- 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
- 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