G03G 21/1878
Electronically readable memory
Official title: {Electronically readable memory}
G03G21/1878 (Electronically readable memory) appears on 955 US grants and 963 published applications in this corpus.
Search patents in G03G- Granted patents
- 955
- Published applications
- 963
- Assignees
- 87
- Inventors
- 1,225
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 5 | 0 |
| 1992 | 3 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 7 | 0 |
| 1997 | 3 | 0 |
| 1998 | 8 | 0 |
| 1999 | 12 | 0 |
| 2000 | 10 | 0 |
| 2001 | 18 | 9 |
| 2002 | 19 | 40 |
| 2003 | 33 | 36 |
| 2004 | 28 | 33 |
| 2005 | 34 | 41 |
| 2006 | 42 | 43 |
| 2007 | 27 | 28 |
| 2008 | 28 | 34 |
| 2009 | 23 | 23 |
| 2010 | 27 | 22 |
| 2011 | 22 | 29 |
| 2012 | 25 | 23 |
| 2013 | 20 | 19 |
| 2014 | 28 | 28 |
| 2015 | 27 | 24 |
| 2016 | 33 | 28 |
| 2017 | 36 | 35 |
| 2018 | 31 | 45 |
| 2019 | 45 | 30 |
| 2020 | 51 | 61 |
| 2021 | 45 | 76 |
| 2022 | 65 | 61 |
| 2023 | 67 | 57 |
| 2024 | 41 | 56 |
| 2025 | 47 | 51 |
| 2026 | 34 | 31 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Developing cartridge6 Oct 2026US 12,754,494 B2Brother Kogyo Kabushiki Kaisha
- Cartridge, toner cartridge, and image forming apparatus29 Sep 2026US 12,748,375 B2Canon Kabushiki Kaisha
- Image forming apparatus1 Sep 2026US 12,724,360 B2Ricoh Company, Ltd.
- Cartridge including a drum-unit with a frame that includes particular arranged recess portion and through-hole25 Aug 2026US 12,717,272 B2Canon Kabushiki Kaisha
- Drum cartridge including storage medium having electrical contact surface positioned at outer surface of drum frame25 Aug 2026US 12,717,273 B2Brother Kogyo Kabushiki Kaisha
- Image forming apparatus and cartridge1 Oct 2026US 2026/0299510 A1Canon Kabushiki Kaisha
- Management system, method, image-forming apparatus, and server apparatus1 Oct 2026US 2026/0299847 A1Canon Kabushiki Kaisha
- Image forming apparatus configured to perform initialization process for first consumable and second consumable attached to main casing in accordance with received instruction24 Sep 2026US 2026/0288058 A1Brother Kogyo Kabushiki Kaisha
- Image forming apparatus configured to perform initialization process to initialize lifetime information in consumable memory of consumable when receiving instruction10 Sep 2026US 2026/0267269 A1Brother Kogyo Kabushiki Kaisha
- Image forming apparatus including controller capable of determining whether developing cartridge, drum cartridge and belt unit are reached their lifetimes6 Aug 2026US 2026/0227734 A1Brother Kogyo Kabushiki Kaisha
Most cited
By later US patents
- Monitor/warranty system for electrostatographic reproducing machines using replaceable cartridges419US 4,961,088 AXerox Corporation · 1990
- Replaceable part with integral memory for usage, calibration and other data311US 5,835,817 AHewlett-Packard Company · 1998
- Method of calibrating a spatial light modulator printing system280US 5,842,088 ATexas Instruments Incorporated · 1998
- Replaceable part with integral memory for usage, calibration and other data276US 5,699,091 AHewlett-Packard Company · 1997
- Process cartridge, electrophotographic image forming apparatus and connection method of connecting contacts214US 5,926,666 ACanon Kabushiki Kaisha · 1999