B41J 2/235
Print head assemblies
B41J2/235 (Print head assemblies) appears on 424 US grants and 85 published applications in this corpus.
Search patents in B41J- Granted patents
- 424
- Published applications
- 85
- Assignees
- 141
- Inventors
- 560
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 19 | 0 |
| 1977 | 20 | 0 |
| 1978 | 15 | 0 |
| 1979 | 14 | 0 |
| 1980 | 21 | 0 |
| 1981 | 20 | 0 |
| 1982 | 11 | 0 |
| 1983 | 16 | 0 |
| 1984 | 20 | 0 |
| 1985 | 21 | 0 |
| 1986 | 21 | 0 |
| 1987 | 14 | 0 |
| 1988 | 6 | 0 |
| 1989 | 12 | 0 |
| 1990 | 15 | 0 |
| 1991 | 19 | 0 |
| 1992 | 21 | 0 |
| 1993 | 15 | 0 |
| 1994 | 10 | 0 |
| 1995 | 6 | 0 |
| 1996 | 9 | 0 |
| 1997 | 7 | 0 |
| 1998 | 5 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 5 | 1 |
| 2002 | 0 | 1 |
| 2003 | 3 | 3 |
| 2004 | 2 | 2 |
| 2005 | 2 | 3 |
| 2006 | 3 | 5 |
| 2007 | 3 | 6 |
| 2008 | 1 | 1 |
| 2009 | 6 | 9 |
| 2010 | 1 | 3 |
| 2011 | 4 | 2 |
| 2012 | 2 | 1 |
| 2013 | 4 | 1 |
| 2014 | 2 | 2 |
| 2015 | 2 | 1 |
| 2016 | 2 | 2 |
| 2017 | 1 | 2 |
| 2018 | 1 | 6 |
| 2019 | 7 | 4 |
| 2020 | 4 | 18 |
| 2021 | 17 | 3 |
| 2022 | 2 | 0 |
| 2023 | 2 | 5 |
| 2024 | 1 | 2 |
| 2025 | 4 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Liquid discharge apparatus19 May 2026US 12,629,945 B2Ricoh Company, Ltd.
- Method for manufacturing element substrate, element substrate, and liquid ejection head9 Sep 2025US 12,409,656 B2Canon Kabushiki Kaisha
- Printing unit with compact cable management9 Sep 2025US 12,409,673 B2Memjet Technology Limited
- Orientation adjustments1 Jul 2025US 12,344,007 B2Hewlett-Packard Development Company, L. P.
- Liquid ejecting unit and liquid ejecting apparatus27 May 2025US 12,311,670 B2Seiko Epson Corporation
- Orientation adjustments25 Sep 2025US 2025/0296351 A1Hewlett-Packard Development Company, L. P.
- Printing unit with compact cable management9 Jan 2025US 2025/0010641 A1Memjet Technology Limited
- Liquid discharge apparatus17 Oct 2024US 2024/0343046 A1Ricoh Company, Ltd.
- Liquid Ejecting Head And Liquid Ejecting Apparatus23 May 2024US 2024/0165963 A1Seiko Epson Corporation
- Orientation adjustments21 Dec 2023US 2023/0406004 A1Hewlett-Packard Development Company, L. P.
Most cited
By later US patents
- Dot printer head with reduced magnetic interference118US 4,537,520 ATokyo Electric Co., Ltd. · 1985
- Printer system66US 3,941,051 APrintronix, Inc. · 1976
- Ink jet recording apparatus and method for replenishing ink in the tank cartridge64US 6,247,803 B1Seiko Epson Corporation · 2001
- Dot matrix printer supply system having ink absorbing member filled under reduced pressure63US 5,156,472 ASeiko Epson Corporation · 1992
- Color printer and multi-ribbon cartridge therefor62US 4,403,874 ARamtek Corporation · 1983