B41F 31/02
Ducts, containers, supply or metering devices
B41F31/02 (Ducts, containers, supply or metering devices) appears on 1,049 US grants and 575 published applications in this corpus.
Search patents in B41F- Granted patents
- 1,049
- Published applications
- 575
- Assignees
- 372
- Inventors
- 1,477
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 25 | 0 |
| 1978 | 13 | 0 |
| 1979 | 13 | 0 |
| 1980 | 10 | 0 |
| 1981 | 12 | 0 |
| 1982 | 19 | 0 |
| 1983 | 33 | 0 |
| 1984 | 30 | 0 |
| 1985 | 26 | 0 |
| 1986 | 19 | 0 |
| 1987 | 20 | 0 |
| 1988 | 10 | 0 |
| 1989 | 18 | 0 |
| 1990 | 17 | 0 |
| 1991 | 41 | 0 |
| 1992 | 40 | 0 |
| 1993 | 29 | 0 |
| 1994 | 26 | 0 |
| 1995 | 26 | 0 |
| 1996 | 19 | 0 |
| 1997 | 24 | 0 |
| 1998 | 26 | 0 |
| 1999 | 27 | 0 |
| 2000 | 32 | 0 |
| 2001 | 21 | 14 |
| 2002 | 37 | 31 |
| 2003 | 43 | 27 |
| 2004 | 28 | 20 |
| 2005 | 12 | 19 |
| 2006 | 15 | 25 |
| 2007 | 14 | 31 |
| 2008 | 9 | 27 |
| 2009 | 14 | 28 |
| 2010 | 8 | 10 |
| 2011 | 13 | 16 |
| 2012 | 11 | 32 |
| 2013 | 9 | 25 |
| 2014 | 20 | 20 |
| 2015 | 21 | 37 |
| 2016 | 33 | 25 |
| 2017 | 25 | 20 |
| 2018 | 16 | 24 |
| 2019 | 13 | 19 |
| 2020 | 14 | 32 |
| 2021 | 14 | 24 |
| 2022 | 33 | 29 |
| 2023 | 26 | 12 |
| 2024 | 19 | 14 |
| 2025 | 10 | 7 |
| 2026 | 2 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B41F 31/04With duct-blades or like metering devices363
- B41F 31/027Ink rail devices for inking ink rollers265
- B41F 31/08With ink ejecting means154
- B41F 31/06Troughs or like reservoirs with immersed or partly immersed, rollers or cylinders87
- B41F 31/14Applications of messenger or other moving transfer rollers74
- B41F 31/022Ink level control devices67
- B41F 31/10Applications of feed or duct rollers50
- B41F 31/13Means for driving fountain rollers35
All 10 subgroupsShow fewer
Recent patents
- Apparatus for manufacturing LED reflective sheet28 Apr 2026US 12,611,856 B2Sanheung Ez Inc.
- Solder paste dispensing feedback system and circuit board printer using the same10 Feb 2026US 12,544,847 B2Illinois Tool Works Inc.
- Fluid delivery system with pump servicing features30 Sep 2025US 12,427,780 B2Hewlett-Packard Development Company, L. P.
- Doctor23 Sep 2025US 12,420,542 B2Tkm Meyer GmbH
- Printing system26 Aug 2025US 12,397,540 B2Bobst Bielefeld GmbH
- Chambered doctor-blade seal assembly, doctor-blade chamber seal, and method for same3 Sep 2026US 2026/0257468 A1Agergaard Graphic Supplies GmbH
- Inkjet Colorization and Imaging System for Eyewear Lenses23 Jul 2026US 2026/0211266 A1
- Pad printing device, method for providing window using the same, and method for providing electronic device having the window16 Jul 2026US 2026/0200255 A1Samsung Display Co., Ltd.
- Ink chamber frame structure and ink chamber device with ink return function5 Mar 2026US 2026/0061741 A1Sunrise Pacific Co., Ltd.
- Method for calculating the parameters for the pre-inking of a printing unit of an offset printing press with a spot colour15 Jan 2026US 2026/0014792 A1Hubergroup Deutschland GmbH
Most cited
By later US patents
- Printing and die-cutting apparatus77US 4,236,955 A1980
- Paste feeding apparatus67US 5,265,773 AKabushiki Kaisha Marukomu · 1993
- Image scan and ink control system65US 3,958,509 AHarris Corporation · 1976
- Inking control apparatus for printing machines52US 4,329,923 AToshiba Kikai Kabushiki Kaisha · 1982
- Multi-color rotary press49US 4,361,089 AMagna-Graphics Corporation · 1982