B41J 2/335
Structure of thermal heads
B41J2/335 (Structure of thermal heads) appears on 772 US grants and 550 published applications in this corpus.
Search patents in B41J- Granted patents
- 772
- Published applications
- 550
- Assignees
- 184
- Inventors
- 1,177
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 5 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 7 | 0 |
| 1985 | 3 | 0 |
| 1986 | 14 | 0 |
| 1987 | 12 | 0 |
| 1988 | 9 | 0 |
| 1989 | 15 | 0 |
| 1990 | 14 | 0 |
| 1991 | 15 | 0 |
| 1992 | 17 | 0 |
| 1993 | 22 | 0 |
| 1994 | 16 | 0 |
| 1995 | 11 | 0 |
| 1996 | 10 | 0 |
| 1997 | 11 | 0 |
| 1998 | 12 | 0 |
| 1999 | 17 | 0 |
| 2000 | 18 | 0 |
| 2001 | 25 | 4 |
| 2002 | 22 | 11 |
| 2003 | 10 | 10 |
| 2004 | 14 | 12 |
| 2005 | 6 | 17 |
| 2006 | 11 | 16 |
| 2007 | 10 | 15 |
| 2008 | 12 | 10 |
| 2009 | 11 | 20 |
| 2010 | 13 | 22 |
| 2011 | 18 | 21 |
| 2012 | 30 | 24 |
| 2013 | 22 | 23 |
| 2014 | 26 | 21 |
| 2015 | 20 | 20 |
| 2016 | 28 | 29 |
| 2017 | 22 | 28 |
| 2018 | 28 | 34 |
| 2019 | 27 | 35 |
| 2020 | 35 | 32 |
| 2021 | 25 | 28 |
| 2022 | 16 | 38 |
| 2023 | 29 | 28 |
| 2024 | 24 | 20 |
| 2025 | 20 | 15 |
| 2026 | 14 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B41J 2/33505Constructional details481
- B41J 2/33555Characterised by type391
- B41J 2/3355Characterised by materials213
- B41J 2/3359Manufacturing processes174
- B41J 2/33545Characterised by dimensions103
- B41J 2/3354Characterised by geometry99
- B41J 2/3358Cooling arrangements56
- B41J 2/33575Processes for assembling process heads53
Recent patents
- Optimal alignment of a printhead in a thermal printing apparatus22 Sep 2026US 12,741,474 B2Hand Held Products, Inc.
- Thermal print head8 Sep 2026US 12,728,647 B2Rohm Co., Ltd.
- Portable thermal printing device1 Sep 2026US 12,722,400 B2
- Thermal print head with COF structure1 Sep 2026US 12,722,401 B2Prinics Co., Ltd.
- Thermal print head and method for manufacturing thermal print head18 Aug 2026US 12,709,104 B2Rohm Co., Ltd.
- Thermal print head and thermal printer1 Oct 2026US 2026/0296050 A1Rohm Co., Ltd.
- Thermal print head1 Oct 2026US 2026/0296051 A1Rohm Co., Ltd.
- Thermal printhead and thermal printer1 Oct 2026US 2026/0296053 A1Rohm Co., Ltd.
- Thermal printer and portable terminal17 Sep 2026US 2026/0273954 A1Seiko Instruments Inc.
- A printing apparatus10 Sep 2026US 2026/0264429 A1Dover Europe SàRl
Most cited
By later US patents
- Thermal-ink heater array using rectifying material153US 5,414,245 AHewlett-Packard Company · 1995
- Highly wear-resistant thermal print heads with silicon-doped diamond-like carbon protective coatings106US 6,046,758 ADiamonex, Incorporated · 2000
- Method for forming thermal-ink heater array using rectifying material83US 5,609,910 AHewlett-Packard Company · 1997
- Method for thermally printing a dye image onto a three dimensional object using flexible heating elements56US 7,563,341 B2Key-Tech, Inc. · 2009
- Integrated thermal printing head and method of manufacturing the same53US 4,259,564 ANippon Electric Co., Ltd. · 1981