B41J 2/055
Devices for absorbing or preventing back-pressure
B41J2/055 (Devices for absorbing or preventing back-pressure) appears on 452 US grants and 436 published applications in this corpus.
Search patents in B41J- Granted patents
- 452
- Published applications
- 436
- Assignees
- 79
- Inventors
- 723
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 4 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 6 | 0 |
| 2000 | 4 | 0 |
| 2001 | 11 | 3 |
| 2002 | 15 | 8 |
| 2003 | 11 | 20 |
| 2004 | 16 | 12 |
| 2005 | 10 | 9 |
| 2006 | 10 | 9 |
| 2007 | 7 | 21 |
| 2008 | 4 | 25 |
| 2009 | 12 | 37 |
| 2010 | 22 | 24 |
| 2011 | 36 | 45 |
| 2012 | 25 | 15 |
| 2013 | 37 | 19 |
| 2014 | 26 | 33 |
| 2015 | 32 | 20 |
| 2016 | 22 | 13 |
| 2017 | 13 | 12 |
| 2018 | 13 | 19 |
| 2019 | 12 | 13 |
| 2020 | 20 | 32 |
| 2021 | 21 | 7 |
| 2022 | 11 | 3 |
| 2023 | 4 | 11 |
| 2024 | 3 | 6 |
| 2025 | 9 | 7 |
| 2026 | 3 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Liquid discharge head and liquid discharge apparatus19 May 2026US 12,629,936 B2Ricoh Company, Ltd.
- Liquid ejection head and manufacturing method of liquid ejection head7 Apr 2026US 12,594,764 B2Canon Kabushiki Kaisha
- Liquid discharge head, head module, head unit, and liquid discharge apparatus24 Feb 2026US 12,558,889 B2Ricoh Company, Ltd.
- Fluid ejection devices with reduced crosstalk2 Dec 2025US 12,485,670 B2FUJIFILM Dimatix, Inc.
- Liquid discharge head, liquid discharge device, and liquid discharge apparatus14 Oct 2025US 12,441,109 B2Ricoh Company, Ltd.
- Liquid ejection head24 Sep 2026US 2026/0285040 A1RISO Technologies Corporation
- Liquid discharge head and image forming apparatus30 Jul 2026US 2026/0217026 A1
- Liquid discharge head, head unit, and liquid discharge apparatus18 Jun 2026US 2026/0166875 A1
- Liquid discharge head, head module, and liquid discharge apparatus4 Jun 2026US 2026/0151997 A1
- Liquid discharge head and method for manufacturing liquid discharge head4 Jun 2026US 2026/0152000 A1Canon Kabushiki Kaisha
Most cited
By later US patents
- Ink jet printhead with ink flow directing valves177US 5,278,585 AXerox Corporation · 1994
- Ink jet printing head and printing apparatus using same142US 6,241,350 B1Canon Kabushiki Kaisha · 2001
- Micro-electromechanical device, liquid discharge head, and method of manufacture therefor89US 6,513,911 B1Canon Kabushiki Kaisha · 2003
- Droplet generator for an ink jet printer78US 4,131,899 ABurroughs Corporation · 1978
- Laminated ink jet recording head having flow path unit with recess that confronts but does not communicate with common ink chamber70US 5,963,234 ASeiko Epson Corporation · 1999