G03G 15/045
With means for charging or discharging distinct portions of the charge pattern
Official title: with means for charging or discharging distinct portions of the charge pattern on the recording material, e.g. for contrast enhancement or discharging non-image areas (G03G15/36, G03G21/06 take precedence)
G03G15/045 (With means for charging or discharging distinct portions of the charge pattern) appears on 239 US grants and 65 published applications in this corpus.
Search patents in G03G- Granted patents
- 239
- Published applications
- 65
- Assignees
- 52
- Inventors
- 409
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 9 | 0 |
| 1978 | 8 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 7 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 7 | 0 |
| 1985 | 9 | 0 |
| 1986 | 9 | 0 |
| 1987 | 8 | 0 |
| 1988 | 16 | 0 |
| 1989 | 17 | 0 |
| 1990 | 20 | 0 |
| 1991 | 13 | 0 |
| 1992 | 10 | 0 |
| 1993 | 5 | 0 |
| 1994 | 5 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 2 |
| 2003 | 0 | 1 |
| 2004 | 1 | 2 |
| 2005 | 0 | 0 |
| 2006 | 0 | 4 |
| 2007 | 2 | 3 |
| 2008 | 3 | 2 |
| 2009 | 1 | 0 |
| 2010 | 3 | 4 |
| 2011 | 1 | 0 |
| 2012 | 3 | 2 |
| 2013 | 1 | 6 |
| 2014 | 0 | 2 |
| 2015 | 9 | 4 |
| 2016 | 4 | 2 |
| 2017 | 3 | 6 |
| 2018 | 6 | 5 |
| 2019 | 5 | 5 |
| 2020 | 4 | 5 |
| 2021 | 5 | 4 |
| 2022 | 4 | 2 |
| 2023 | 1 | 1 |
| 2024 | 2 | 2 |
| 2025 | 2 | 1 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Image forming apparatus with charging current detector28 Apr 2026US 12,613,480 B2Canon Kabushiki Kaisha
- Light emitting apparatus and image forming apparatus14 Apr 2026US 12,601,987 B2FUJIFILM Business Innovation Corp.
- Disruptions of toner transfers from developers to photoreceptors27 May 2025US 12,313,984 B2Hewlett-Packard Development Company, L. P.
- Image forming apparatus22 Apr 2025US 12,282,266 B2KYOCERA Document Solutions Inc.
- Image forming apparatus with charge eliminating needle protection cover that maintains constant interval between the needle and a sheet24 Sep 2024US 12,099,311 B2KYOCERA Document Solutions Inc.
- Image forming apparatus4 Sep 2025US 2025/0278035 A1Canon Kabushiki Kaisha
- Image forming apparatus19 Sep 2024US 2024/0310751 A1KYOCERA Document Solutions Inc.
- Disruptions of toner transfers from developers to photoreceptors5 Sep 2024US 2024/0295836 A1Hewlett-Packard Development Company, L. P.
- Image forming apparatus21 Dec 2023US 2023/0408947 A1KYOCERA Document Solutions Inc.
- Light emitting apparatus and image forming apparatus25 Aug 2022US 2022/0269190 A1FUJIFILM Business Innovation Corp.
Most cited
By later US patents
- Collector for an LED array195US 4,767,172 AXerox Corporation · 1988
- Electrophotographic process and apparatus119US 4,071,361 ACanon Kabushiki Kaisha · 1978
- Dual mode electrophotographic apparatus having dual function printing beam61US 4,046,471 AInternational Business Machines Corporation · 1977
- Copying apparatus and method with editing and production control capability56US 4,777,510 AEastman Kodak Company · 1988
- Imaging system for electrostatic reproduction machines40US 3,967,891 AXerox Corporation · 1976