G03G 21/1892
For presence detection, authentication
Official title: {for presence detection, authentication}
G03G21/1892 (For presence detection, authentication) appears on 200 US grants and 214 published applications in this corpus.
Search patents in G03G- Granted patents
- 200
- Published applications
- 214
- Assignees
- 42
- Inventors
- 344
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 11 |
| 2003 | 6 | 4 |
| 2004 | 3 | 3 |
| 2005 | 2 | 11 |
| 2006 | 7 | 11 |
| 2007 | 7 | 8 |
| 2008 | 9 | 6 |
| 2009 | 4 | 7 |
| 2010 | 6 | 5 |
| 2011 | 7 | 12 |
| 2012 | 9 | 5 |
| 2013 | 10 | 3 |
| 2014 | 7 | 6 |
| 2015 | 5 | 6 |
| 2016 | 8 | 6 |
| 2017 | 7 | 8 |
| 2018 | 7 | 11 |
| 2019 | 13 | 8 |
| 2020 | 16 | 16 |
| 2021 | 6 | 14 |
| 2022 | 15 | 13 |
| 2023 | 12 | 16 |
| 2024 | 6 | 7 |
| 2025 | 8 | 12 |
| 2026 | 6 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Developing cartridge for detachable mounting to an imaging device25 Aug 2026US 12,717,274 B2Zhuhai Un-Tern Imaging Products Co., Ltd
- Image forming apparatus28 Jul 2026US 12,693,625 B2Canon Kabushiki Kaisha
- Management system, method, image-forming apparatus, and server apparatus for replacing cartridges7 Jul 2026US 12,675,246 B2Canon Kabushiki Kaisha
- Image forming apparatus9 Jun 2026US 12,650,663 B2Canon Kabushiki Kaisha
- Image forming apparatus and initialization method of initializing consumable memory included in consumable attached to main casing of image forming apparatus26 May 2026US 12,638,806 B2Brother Kogyo Kabushiki Kaisha
- Management system, method, image-forming apparatus, and server apparatus1 Oct 2026US 2026/0299847 A1Canon Kabushiki Kaisha
- Information processing system, image processing apparatus, and information processing method28 May 2026US 2026/0148249 A1KYOCERA Document Solutions Inc.
- Image forming apparatus and processing method5 Mar 2026US 2026/0064076 A1Canon Kabushiki Kaisha
- Information provision system and information provision method26 Feb 2026US 2026/0056508 A1Canon Kabushiki Kaisha
- Device attachable to and detachable from image-forming apparatus, and method and apparatus for remanufacturing the device12 Feb 2026US 2026/0044096 A1Canon Kabushiki Kaisha
Most cited
By later US patents
- Monitor/warranty system for electrostatographic reproducing machines using replaceable cartridges419US 4,961,088 AXerox Corporation · 1990
- 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
- Monitoring system with dual memory for electrophotographic printing machines using replaceable cartridges77US 5,283,613 AXerox Corporation · 1994
- Genuine security article distinguishing system for an image forming apparatus68US 5,132,729 AMinolta Camera Kabushiki Kaisha · 1992
- Image forming apparatus having programmable developer cartridge45US 5,579,088 ASamsung Electronics Co., Ltd. · 1996