G03G 21/1633
Using doors or covers
Official title: {using doors or covers (G03G21/1638 takes precedence)}
G03G21/1633 (Using doors or covers) appears on 1,499 US grants and 1,572 published applications in this corpus.
Search patents in G03G- Granted patents
- 1,499
- Published applications
- 1,572
- Assignees
- 92
- Inventors
- 1,875
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 7 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 6 | 0 |
| 1991 | 3 | 0 |
| 1992 | 6 | 0 |
| 1993 | 5 | 0 |
| 1994 | 8 | 0 |
| 1995 | 6 | 0 |
| 1996 | 13 | 0 |
| 1997 | 10 | 0 |
| 1998 | 11 | 0 |
| 1999 | 11 | 0 |
| 2000 | 7 | 0 |
| 2001 | 10 | 4 |
| 2002 | 10 | 10 |
| 2003 | 7 | 8 |
| 2004 | 10 | 11 |
| 2005 | 9 | 19 |
| 2006 | 14 | 35 |
| 2007 | 18 | 25 |
| 2008 | 18 | 30 |
| 2009 | 18 | 33 |
| 2010 | 29 | 40 |
| 2011 | 33 | 62 |
| 2012 | 43 | 65 |
| 2013 | 51 | 72 |
| 2014 | 86 | 69 |
| 2015 | 118 | 94 |
| 2016 | 104 | 80 |
| 2017 | 76 | 86 |
| 2018 | 85 | 91 |
| 2019 | 93 | 80 |
| 2020 | 75 | 59 |
| 2021 | 72 | 99 |
| 2022 | 79 | 95 |
| 2023 | 95 | 80 |
| 2024 | 75 | 103 |
| 2025 | 89 | 119 |
| 2026 | 69 | 103 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Medium transport device and recording apparatus29 Sep 2026US 12,746,770 B2Seiko Epson Corporation
- Image forming apparatus including developing device supporting structure having guide groove29 Sep 2026US 12,748,373 B2Brother Kogyo Kabushiki Kaisha
- 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.
- Image forming apparatus that includes movable unit supporting transfer member to which transfer voltage is applied15 Sep 2026US 12,736,912 B2KYOCERA Document Solutions Inc.
- Image forming device including switch switching according to whether fixing device is mounted or removed8 Oct 2026US 2026/0310122 A1Brother Kogyo Kabushiki Kaisha
- Image forming apparatus8 Oct 2026US 2026/0310128 A1Sharp Kabushiki Kaisha
- Optical scanning device and image forming apparatus1 Oct 2026US 2026/0299459 A1Konica Minolta, Inc.
- Interlock mechanism and image forming apparatus1 Oct 2026US 2026/0299506 A1FUJIFILM Business Innovation Corp.
- Image forming apparatus1 Oct 2026US 2026/0299512 A1Brother Kogyo Kabushiki Kaisha
Most cited
By later US patents
- Process cartridge, electrophotographic image forming apparatus, driving force transmission part, and electrophotographic photosensitive drum289US 5,903,803 ACanon Kabushiki Kaisha · 1999
- Process cartridge and image forming apparatus280US 5,585,889 ACanon Kabushiki Kaisha · 1996
- Process cartridge and drum mount for photosensitive drum213US 6,240,266 B1Canon Kabushiki Kaisha · 2001
- Process cartridge, electrophotographic image forming apparatus, driving force transmission part, and electrophotographic photosensitive drum160US 6,128,454 ACanon Kabushiki Kaisha · 2000
- Coupling part, photosensitive drum, process cartridge and electrophotographic image forming apparatus156US 6,400,914 B1Canon Kabushiki Kaisha · 2002