G03G 15/0849
Detection or control means for the developer concentration
Official title: {Detection or control means for the developer concentration}
G03G15/0849 (Detection or control means for the developer concentration) appears on 1,898 US grants and 1,309 published applications in this corpus.
Search patents in G03G- Granted patents
- 1,898
- Published applications
- 1,309
- Assignees
- 157
- Inventors
- 2,731
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 8 | 0 |
| 1978 | 10 | 0 |
| 1979 | 4 | 0 |
| 1980 | 14 | 0 |
| 1981 | 13 | 0 |
| 1982 | 15 | 0 |
| 1983 | 10 | 0 |
| 1984 | 12 | 0 |
| 1985 | 23 | 0 |
| 1986 | 21 | 0 |
| 1987 | 18 | 0 |
| 1988 | 11 | 0 |
| 1989 | 18 | 0 |
| 1990 | 44 | 0 |
| 1991 | 39 | 0 |
| 1992 | 39 | 0 |
| 1993 | 41 | 0 |
| 1994 | 27 | 0 |
| 1995 | 28 | 0 |
| 1996 | 42 | 0 |
| 1997 | 38 | 0 |
| 1998 | 58 | 0 |
| 1999 | 46 | 0 |
| 2000 | 42 | 0 |
| 2001 | 43 | 24 |
| 2002 | 56 | 53 |
| 2003 | 59 | 50 |
| 2004 | 48 | 69 |
| 2005 | 43 | 80 |
| 2006 | 66 | 73 |
| 2007 | 75 | 101 |
| 2008 | 54 | 101 |
| 2009 | 66 | 120 |
| 2010 | 93 | 89 |
| 2011 | 80 | 80 |
| 2012 | 110 | 69 |
| 2013 | 65 | 43 |
| 2014 | 69 | 39 |
| 2015 | 61 | 35 |
| 2016 | 55 | 45 |
| 2017 | 23 | 30 |
| 2018 | 33 | 39 |
| 2019 | 44 | 27 |
| 2020 | 32 | 32 |
| 2021 | 22 | 32 |
| 2022 | 21 | 19 |
| 2023 | 16 | 10 |
| 2024 | 14 | 14 |
| 2025 | 11 | 25 |
| 2026 | 9 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Image forming apparatus25 Aug 2026US 12,717,258 B2Sharp Kabushiki Kaisha
- Developing cartridge for detachable mounting to an imaging device25 Aug 2026US 12,717,274 B2Zhuhai Un-Tern Imaging Products Co., Ltd
- Cartridge, image forming apparatus, developing apparatus, and toner cartridge28 Jul 2026US 12,693,612 B2Canon Kabushiki Kaisha
- Image forming apparatus14 Jul 2026US 12,681,424 B2KYOCERA Document Solutions Inc.
- Image forming apparatus2 Jun 2026US 12,645,169 B2Canon Kabushiki Kaisha
- Image forming apparatus6 Aug 2026US 2026/0227722 A1KYOCERA Document Solutions Inc.
- Image forming apparatus6 Aug 2026US 2026/0227731 A1KYOCERA Document Solutions Inc.
- Image forming apparatus6 Aug 2026US 2026/0227733 A1KYOCERA Document Solutions Inc.
- Toner cartridge16 Jul 2026US 2026/0202789 A1General Plastic Industrial Co., Ltd.
- Developing device and image forming apparatus9 Jul 2026US 2026/0194838 A1FUJIFILM Business Innovation Corp.
Most cited
By later US patents
- Replaceable part with integral memory for usage, calibration and other data311US 5,835,817 AHewlett-Packard Company · 1998
- Arrangement for printer equipment for monitoring reservoirs that contain printing medium284US 5,365,312 AMannesmann Aktiengesellschaft · 1994
- Replaceable part with integral memory for usage, calibration and other data276US 5,699,091 AHewlett-Packard Company · 1997
- Password protected memory on replaceable components for printing devices182US 6,738,903 B1Hewlett-Packard Development Company, L. P. · 2004
- Process cartridge, unit, and electrophotographic image forming apparatus169US 6,912,365 B2Canon Kabushiki Kaisha · 2005