G03G 15/0856
Detection or control means for the developer level
Official title: {Detection or control means for the developer level}
G03G15/0856 (Detection or control means for the developer level) appears on 1,198 US grants and 1,033 published applications in this corpus.
Search patents in G03G- Granted patents
- 1,198
- Published applications
- 1,033
- Assignees
- 116
- Inventors
- 1,900
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 4 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 6 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 9 | 0 |
| 1991 | 13 | 0 |
| 1992 | 7 | 0 |
| 1993 | 9 | 0 |
| 1994 | 8 | 0 |
| 1995 | 9 | 0 |
| 1996 | 22 | 0 |
| 1997 | 24 | 0 |
| 1998 | 22 | 0 |
| 1999 | 19 | 0 |
| 2000 | 21 | 0 |
| 2001 | 21 | 20 |
| 2002 | 31 | 28 |
| 2003 | 37 | 30 |
| 2004 | 18 | 22 |
| 2005 | 28 | 36 |
| 2006 | 26 | 43 |
| 2007 | 21 | 35 |
| 2008 | 24 | 45 |
| 2009 | 25 | 50 |
| 2010 | 44 | 39 |
| 2011 | 43 | 51 |
| 2012 | 45 | 47 |
| 2013 | 40 | 36 |
| 2014 | 56 | 43 |
| 2015 | 62 | 51 |
| 2016 | 62 | 51 |
| 2017 | 45 | 44 |
| 2018 | 44 | 46 |
| 2019 | 58 | 41 |
| 2020 | 54 | 48 |
| 2021 | 55 | 69 |
| 2022 | 53 | 39 |
| 2023 | 32 | 28 |
| 2024 | 24 | 33 |
| 2025 | 28 | 33 |
| 2026 | 17 | 25 |
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 apparatus1 Sep 2026US 12,724,360 B2Ricoh Company, Ltd.
- Image forming device that determines when to fill toner for forming images25 Aug 2026US 12,717,253 B2Sharp Kabushiki Kaisha
- Image forming apparatus having a toner supplying operation25 Aug 2026US 12,717,260 B2Canon Kabushiki Kaisha
- Image forming apparatus1 Oct 2026US 2026/0299462 A1
- Image forming apparatus1 Oct 2026US 2026/0299485 A1Canon Kabushiki Kaisha
- Substrate unit and image forming apparatus24 Sep 2026US 2026/0288034 A1Canon Kabushiki Kaisha
- Replenishment management system including image forming apparatus and server apparatus24 Sep 2026US 2026/0288041 A1Canon Kabushiki Kaisha
- Image forming apparatus24 Sep 2026US 2026/0288042 A1
Most cited
By later US patents
- Method of calibrating a spatial light modulator printing system280US 5,842,088 ATexas Instruments Incorporated · 1998
- Imaging apparatus cartridge including an encoded device182US 5,995,772 ALexmark International, Inc. · 1999
- Capacitive sensor168US 5,465,619 AXerox Corporation · 1995
- Process cartridge, method for assembling process cartridge and image forming appararatus167US 5,500,714 ACanon Kabushiki Kaisha · 1996
- Developing cartridge157US 6,072,969 ACanon Kabushiki Kaisha · 2000