B41J
Typewriters
Official title: Typewriters; selective printing mechanisms, i.e. mechanisms printing otherwise than from a forme; correction of typographical errors
B41J (Typewriters) appears on 80,245 US grants and 70,854 published applications in this corpus.
Search patents in B41J- Granted patents
- 80,245
- Published applications
- 70,854
- Assignees
- 5,348
- Inventors
- 56,968
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 387 | 0 |
| 1977 | 360 | 0 |
| 1978 | 305 | 0 |
| 1979 | 251 | 0 |
| 1980 | 361 | 0 |
| 1981 | 410 | 0 |
| 1982 | 405 | 0 |
| 1983 | 497 | 0 |
| 1984 | 478 | 0 |
| 1985 | 629 | 0 |
| 1986 | 645 | 0 |
| 1987 | 660 | 0 |
| 1988 | 688 | 0 |
| 1989 | 729 | 0 |
| 1990 | 706 | 0 |
| 1991 | 727 | 0 |
| 1992 | 797 | 0 |
| 1993 | 744 | 0 |
| 1994 | 668 | 0 |
| 1995 | 826 | 0 |
| 1996 | 943 | 0 |
| 1997 | 939 | 0 |
| 1998 | 1473 | 0 |
| 1999 | 1461 | 0 |
| 2000 | 1839 | 0 |
| 2001 | 2166 | 664 |
| 2002 | 2322 | 2154 |
| 2003 | 2134 | 2267 |
| 2004 | 1993 | 2844 |
| 2005 | 1759 | 3635 |
| 2006 | 2063 | 3332 |
| 2007 | 2063 | 3314 |
| 2008 | 2252 | 3327 |
| 2009 | 2155 | 3398 |
| 2010 | 2829 | 2952 |
| 2011 | 2963 | 2960 |
| 2012 | 2763 | 2672 |
| 2013 | 2921 | 2882 |
| 2014 | 3435 | 2705 |
| 2015 | 3362 | 2790 |
| 2016 | 2869 | 2626 |
| 2017 | 2426 | 2996 |
| 2018 | 2390 | 3068 |
| 2019 | 2800 | 2921 |
| 2020 | 2674 | 3010 |
| 2021 | 2349 | 2861 |
| 2022 | 2194 | 2671 |
| 2023 | 2121 | 2448 |
| 2024 | 2029 | 2368 |
| 2025 | 1913 | 2237 |
| 2026 | 1372 | 1752 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- B41J 2/00Typewriters or selective printing mechanisms characterised by the printing or marking process56,659
- B41J 11/00Devices or arrangements of selective printing mechanisms14,761
- B41J 29/00Details of, or accessories for, typewriters or selective printing mechanisms not otherwise11,623
- B41J 3/00Typewriters or selective printing or marking mechanisms characterised by the purpose for10,548
- B41J 2202/00Embodiments of or processes related to ink-jet or thermal headsIndexing code9,569
- B41J 13/00Devices or arrangements of selective printing mechanisms6,381
- B41J 15/00Devices or arrangements of selective printing mechanisms3,699
- B41J 25/00Actions or mechanisms not otherwise provided for3,697
All 22 main groupsShow fewer
- B41J 19/00Character- or line-spacing mechanisms2,476
- B41J 35/00Typewriters: other apparatus or arrangements associated with, or incorporated in, ink-ribbon mechanisms1,043
- B41J 17/00Mechanisms for manipulating page-width impression-transfer material893
- B41J 33/00Apparatus or arrangements for feeding ink ribbons or like character-size impression-transfer material891
- B41J 32/00Ink-ribbon cartridges765
- B41J 5/00Devices or arrangements for controlling character selection624
- B41J 23/00Power drives for actions or mechanisms579
- B41J 1/00Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition534
- B41J 9/00Hammer-impression mechanisms436
- B41J 31/00Ink ribbons380
- B41J 2203/00Embodiments of or processes related to the control of the printing processIndexing code278
- B41J 7/00Type-selecting or type-actuating mechanisms172
- B41J 21/00Column, tabular or like printing arrangements113
- B41J 27/00Inking apparatus86
Recent patents
- Printing device, preferably a 3D printer6 Oct 2026US 12,752,482 B2Liqtra GmbH
- Drive circuit board and liquid ejection apparatus6 Oct 2026US 12,752,527 B2Seiko Epson Corporation
- Liquid ejection apparatus, recording medium, and liquid ejection head6 Oct 2026US 12,752,528 B2Konica Minolta, Inc.
- Ink jet recording method and ink jet recording apparatus6 Oct 2026US 12,752,529 B2Canon Kabushiki Kaisha
- Liquid discharge head and liquid discharge device6 Oct 2026US 12,752,530 B2RISO Technologies Corporation
- Printed documents readily identifying indicia printing defects8 Oct 2026US 2026/0306937 A1Brightstar Global Solutions Corporation
- Drive waveform generator, liquid discharge head, liquid discharge apparatus, manufacturing apparatus for display devices, and method of manufacturing display devices8 Oct 2026US 2026/0307382 A1
- Liquid discharge head substrate, liquid discharge head, and liquid discharge apparatus8 Oct 2026US 2026/0307383 A1Canon Kabushiki Kaisha
- Printing device and method for controlling the same8 Oct 2026US 2026/0307384 A1Samsung Display Co., Ltd.
- Printing apparatus, control method, and storage medium8 Oct 2026US 2026/0307385 A1Canon Kabushiki Kaisha
Most cited
By later US patents
- Bubble jet recording method and apparatus in which a heating element generates bubbles in a liquid flow path to project droplets2,047US 4,723,129 ACanon Kabushiki Kaisha · 1988
- Droplet generating method and apparatus thereof1,847US 4,463,359 ACanon Kabushiki Kaisha · 1984
- Bubble jet recording method and apparatus in which a heating element generates bubbles in multiple liquid flow paths to project droplets1,733US 4,740,796 ACanon Kabushiki Kaisha · 1988
- Liquid jet recording head1,616US 4,558,333 ACanon Kabushiki Kaisha · 1985
- Ink jet recording method1,590US 4,345,262 ACanon Kabushiki Kaisha · 1982