G03G 15/30
In which projection is formed on a drum
Official title: in which projection is formed on a drum
G03G15/30 (In which projection is formed on a drum) appears on 212 US grants and 24 published applications in this corpus.
Search patents in G03G- Granted patents
- 212
- Published applications
- 24
- Assignees
- 44
- Inventors
- 369
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 18 | 0 |
| 1978 | 18 | 0 |
| 1979 | 13 | 0 |
| 1980 | 18 | 0 |
| 1981 | 16 | 0 |
| 1982 | 11 | 0 |
| 1983 | 12 | 0 |
| 1984 | 13 | 0 |
| 1985 | 8 | 0 |
| 1986 | 7 | 0 |
| 1987 | 8 | 0 |
| 1988 | 6 | 0 |
| 1989 | 7 | 0 |
| 1990 | 5 | 0 |
| 1991 | 8 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 3 |
| 2005 | 2 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 1 |
| 2009 | 0 | 2 |
| 2010 | 0 | 0 |
| 2011 | 2 | 1 |
| 2012 | 1 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 1 | 4 |
| 2019 | 2 | 2 |
| 2020 | 1 | 0 |
| 2021 | 0 | 2 |
| 2022 | 0 | 2 |
| 2023 | 3 | 1 |
| 2024 | 2 | 1 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Image forming apparatus that can perform light amount calibration to adjust the density of a half tone image30 Jun 2026US 12,669,764 B2KYOCERA Document Solutions Inc.
- Optical scanning apparatus and image forming apparatus19 Nov 2024US 12,147,032 B1Canon Kabushiki Kaisha
- Image forming apparatus member, transfer device, and image forming apparatus24 Sep 2024US 12,099,314 B2FUJIFILM Business Innovation Corp.
- Optical scanning apparatus and image forming apparatus15 Aug 2023US 11,726,316 B2Canon Kabushiki Kaisha
- Developing device and image forming apparatus incorporating same2 May 2023US 11,640,124 B2Ricoh Company, Ltd.
- Image forming apparatus10 Jul 2025US 2025/0224689 A1KYOCERA Document Solutions Inc.
- Image forming apparatus member, transfer device, and image forming apparatus25 Jan 2024US 2024/0027933 A1FUJIFILM Business Innovation Corp.
- Optical scanning apparatus and image forming apparatus26 Oct 2023US 2023/0341678 A1Canon Kabushiki Kaisha
- Image forming apparatus31 Mar 2022US 2022/0100136 A1Sharp Kabushiki Kaisha
- Developing device and image forming apparatus incorporating same17 Mar 2022US 2022/0082956 A1Ricoh Company, Ltd.
Most cited
By later US patents
- Image forming apparatus having an image bearing member reciprocally movable in the direction of the rotational axis thereof72US 4,833,502 ACanon Kabushiki Kaisha · 1989
- Electronic typewriter having an electronic display43US 4,194,833 AStatic Systems Corporation · 1980
- Electrophotographic type image forming apparatus42US 4,754,293 ASeiko Epson Corporation · 1988
- Copying apparatus for copying a plurality of original surfaces with a single scan41US 4,017,173 ACanon Kabushiki Kaisha · 1977
- Copy paper feed system40US 4,009,957 ARicoh Company, Ltd. · 1977