G03G 15/0853
The concentration being measured by magnetic means
Official title: {the concentration being measured by magnetic means}
G03G15/0853 (The concentration being measured by magnetic means) appears on 379 US grants and 242 published applications in this corpus.
Search patents in G03G- Granted patents
- 379
- Published applications
- 242
- Assignees
- 59
- Inventors
- 698
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 7 | 0 |
| 1981 | 5 | 0 |
| 1982 | 5 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 7 | 0 |
| 1987 | 9 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 12 | 0 |
| 1991 | 14 | 0 |
| 1992 | 14 | 0 |
| 1993 | 12 | 0 |
| 1994 | 9 | 0 |
| 1995 | 3 | 0 |
| 1996 | 7 | 0 |
| 1997 | 5 | 0 |
| 1998 | 7 | 0 |
| 1999 | 7 | 0 |
| 2000 | 10 | 0 |
| 2001 | 7 | 4 |
| 2002 | 12 | 5 |
| 2003 | 5 | 8 |
| 2004 | 3 | 7 |
| 2005 | 5 | 15 |
| 2006 | 13 | 19 |
| 2007 | 11 | 20 |
| 2008 | 13 | 15 |
| 2009 | 14 | 25 |
| 2010 | 16 | 15 |
| 2011 | 13 | 20 |
| 2012 | 25 | 6 |
| 2013 | 10 | 6 |
| 2014 | 14 | 10 |
| 2015 | 9 | 4 |
| 2016 | 11 | 13 |
| 2017 | 6 | 5 |
| 2018 | 4 | 6 |
| 2019 | 10 | 5 |
| 2020 | 3 | 6 |
| 2021 | 8 | 6 |
| 2022 | 2 | 3 |
| 2023 | 2 | 5 |
| 2024 | 4 | 3 |
| 2025 | 3 | 7 |
| 2026 | 3 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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.
- Developing device including toner concentration sensor that detects toner concentration in developer and image forming apparatus17 Feb 2026US 12,554,213 B2KYOCERA Document Solutions Inc.
- Image forming device and toner replenishment control method in image forming device2 Dec 2025US 12,487,541 B2Sharp Kabushiki Kaisha
- Developing device having inductance sensor6 May 2025US 12,292,703 B2Canon Kabushiki Kaisha
- Developing device and image forming apparatus9 Jul 2026US 2026/0194838 A1FUJIFILM Business Innovation Corp.
- Image forming apparatus7 May 2026US 2026/0126739 A1KYOCERA Document Solutions Inc.
- Image forming apparatus7 May 2026US 2026/0126741 A1KYOCERA Document Solutions Inc.
- Image forming apparatus22 Jan 2026US 2026/0023336 A1Canon Kabushiki Kaisha
- Image forming apparatus16 Oct 2025US 2025/0321533 A1KYOCERA Document Solutions Inc.
Most cited
By later US patents
- Device for detecting the life of an image forming process unit, opening of a seal of the unit and attachment of the unit to an image forming apparatus94US 4,873,549 AMita Industrial Co., Ltd. · 1989
- Image forming apparatus and method for obtaining appropriate toner density50US 6,055,388 ARicoh Company, Ltd. · 2000
- Electrostatic copying machine46US 4,226,525 ARicoh Company, Ltd. · 1980
- Image forming equipment having improved toner sensing46US 5,270,783 ARicoh Company, Ltd. · 1993
- Conveyor device and image forming apparatus46US 7,248,824 B2Ricoh Company, Ltd. · 2007