G03G 15/55
Self-diagnostics
Official title: {Self-diagnostics; Malfunction or lifetime display}
G03G15/55 (Self-diagnostics) appears on 3,422 US grants and 3,558 published applications in this corpus.
Search patents in G03G- Granted patents
- 3,422
- Published applications
- 3,558
- Assignees
- 198
- Inventors
- 5,232
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 5 | 0 |
| 1980 | 3 | 0 |
| 1981 | 5 | 0 |
| 1982 | 6 | 0 |
| 1983 | 4 | 0 |
| 1984 | 6 | 0 |
| 1985 | 18 | 0 |
| 1986 | 13 | 0 |
| 1987 | 13 | 0 |
| 1988 | 12 | 0 |
| 1989 | 18 | 0 |
| 1990 | 13 | 0 |
| 1991 | 18 | 0 |
| 1992 | 22 | 0 |
| 1993 | 24 | 0 |
| 1994 | 33 | 0 |
| 1995 | 28 | 0 |
| 1996 | 33 | 0 |
| 1997 | 30 | 0 |
| 1998 | 40 | 0 |
| 1999 | 34 | 0 |
| 2000 | 27 | 0 |
| 2001 | 19 | 11 |
| 2002 | 32 | 52 |
| 2003 | 42 | 53 |
| 2004 | 36 | 86 |
| 2005 | 50 | 118 |
| 2006 | 83 | 118 |
| 2007 | 92 | 124 |
| 2008 | 86 | 145 |
| 2009 | 68 | 134 |
| 2010 | 109 | 115 |
| 2011 | 100 | 142 |
| 2012 | 119 | 136 |
| 2013 | 137 | 139 |
| 2014 | 157 | 136 |
| 2015 | 197 | 171 |
| 2016 | 186 | 145 |
| 2017 | 127 | 169 |
| 2018 | 181 | 240 |
| 2019 | 240 | 211 |
| 2020 | 199 | 175 |
| 2021 | 151 | 200 |
| 2022 | 182 | 183 |
| 2023 | 136 | 118 |
| 2024 | 112 | 148 |
| 2025 | 102 | 165 |
| 2026 | 72 | 124 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Intermediate transfer unit and image forming apparatus with replaceable cleaning device6 Oct 2026US 12,754,495 B2Canon Kabushiki Kaisha
- Image forming system for inspecting a printed image6 Oct 2026US 12,754,504 B2Canon Kabushiki Kaisha
- Image forming apparatus that can predict a life of the fixing roller6 Oct 2026US 12,754,505 B2KYOCERA Document Solutions Inc.
- Image forming apparatus and abnormality determination device15 Sep 2026US 12,736,907 B2Ricoh Company, Ltd.
- Image forming apparatus having locking device with failure detection15 Sep 2026US 12,736,911 B2Ricoh Company, Ltd.
- Optical scanning device and image forming apparatus1 Oct 2026US 2026/0299459 A1Konica Minolta, Inc.
- Sensor apparatus and image forming apparatus1 Oct 2026US 2026/0299480 A1KYOCERA Document Solutions Inc.
- Image forming apparatus1 Oct 2026US 2026/0299485 A1Canon Kabushiki Kaisha
- Image forming apparatus1 Oct 2026US 2026/0299850 A1Canon Kabushiki Kaisha
- Substrate unit and image forming apparatus24 Sep 2026US 2026/0288034 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
- 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
- Centralized control system for terminal device203US 5,282,127 ASanyo Electric Co., Ltd. · 1994