B41L
Apparatus or devices for manifolding, duplicating or printing for office or other
Official title: APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES (printing presses or machines for industrial purposes B41F; stamps, stamping or numbering devices B41K)
B41L (Apparatus or devices for manifolding, duplicating or printing for office or other) appears on 991 US grants and 337 published applications in this corpus.
Search patents in B41L- Granted patents
- 991
- Published applications
- 337
- Assignees
- 261
- Inventors
- 1,188
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 36 | 0 |
| 1977 | 44 | 0 |
| 1978 | 37 | 0 |
| 1979 | 36 | 0 |
| 1980 | 30 | 0 |
| 1981 | 20 | 0 |
| 1982 | 13 | 0 |
| 1983 | 22 | 0 |
| 1984 | 17 | 0 |
| 1985 | 16 | 0 |
| 1986 | 28 | 0 |
| 1987 | 27 | 0 |
| 1988 | 20 | 0 |
| 1989 | 22 | 0 |
| 1990 | 29 | 0 |
| 1991 | 17 | 0 |
| 1992 | 21 | 0 |
| 1993 | 21 | 0 |
| 1994 | 21 | 0 |
| 1995 | 20 | 0 |
| 1996 | 30 | 0 |
| 1997 | 34 | 0 |
| 1998 | 24 | 0 |
| 1999 | 27 | 0 |
| 2000 | 31 | 0 |
| 2001 | 33 | 26 |
| 2002 | 41 | 27 |
| 2003 | 33 | 11 |
| 2004 | 23 | 21 |
| 2005 | 10 | 21 |
| 2006 | 10 | 23 |
| 2007 | 10 | 12 |
| 2008 | 15 | 19 |
| 2009 | 6 | 14 |
| 2010 | 13 | 8 |
| 2011 | 14 | 11 |
| 2012 | 10 | 2 |
| 2013 | 4 | 15 |
| 2014 | 9 | 11 |
| 2015 | 14 | 15 |
| 2016 | 12 | 8 |
| 2017 | 9 | 6 |
| 2018 | 11 | 11 |
| 2019 | 8 | 13 |
| 2020 | 9 | 17 |
| 2021 | 15 | 13 |
| 2022 | 13 | 14 |
| 2023 | 7 | 8 |
| 2024 | 8 | 7 |
| 2025 | 8 | 2 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- B41L 13/00Stencilling apparatus for office or other commercial use369
- B41L 1/00Devices for performing operations in connection with manifolding by means of pressure-sensitive240
- B41L 19/00Duplicating or printing apparatus or machines for office or other commercial purposes83
- B41L 29/00Devices for attaching printing elements or formes to supports63
- B41L 43/00Auxiliary folding, collecting, or depositing of sheets or webs55
- B41L 47/00Details of addressographs or like series-printing machines47
- B41L 21/00Devices for conveying sheets or webs of copy material through the apparatus43
- B41L 31/00Devices for removing flexible printing formes from forme cylinders38
All 25 main groupsShow fewer
- B41L 27/00Inking arrangements or devices36
- B41L 39/00Indicating, counting, warning, control, or safety devices34
- B41L 17/00Lithographic printing apparatus for office or other commercial purposes26
- B41L 23/00Devices for treating the surfaces of sheets, webs, or other articles in20
- B41L 41/00Cleaning arrangements or devices18
- B41L 3/00Platens or like sheet supports for manifolding using pressure-sensitive layers or intermediaries13
- B41L 11/00Apparatus for directly duplicating from hectographic masters in mirror image, i.e. "wet11
- B41L 15/00Letterpress printing apparatus specially adapted for office or other commercial purposes10
- B41L 45/00Kinds or types of addressing machines or of like series-printing machines10
- B41L 35/00Cylinders for apparatus or machines for manifolding, duplicating, or printing for office8
- B41L 25/00Devices for damping printing surfaces7
- B41L 5/00Autographic registers or like manifolding apparatus using movable strips or webs5
- B41L 49/00Accessories or attachments for addressographs or like series-printing machines2
- B41L 7/00Apparatus for directly duplicating from hectographic originals, i.e. for obtaining copies in2
- B41L 9/00Apparatus for indirectly duplicating from hectographic originals by means of hectographic intermediaries2
- B41L 33/00Pressing flexible printing formes or sheets or webs of copy material against0
- B41L 38/00Devices for attaching coverings or make-ready devices0
Recent patents
- Stencil printer21 Jul 2026US 12,686,204 B2Illinois Tool Works Inc.
- Methods and kits for screen-printing26 May 2026US 12,636,875 B1
- Systems and methods for automatically cleaning converters with heated fluids3 Feb 2026US 12,539,699 B2Ecochem Australia Pty Ltd
- Print agent drying apparatus16 Dec 2025US 12,496,845 B2HP Scitex Ltd.
- Stencil printer cover having movable door with closing feature11 Nov 2025US 12,466,178 B2Illinois Tool Works Inc.
- Printing operation with improved stencil separation27 Aug 2026US 2026/0249633 A1Asmpt Smt Singapore Pte. Ltd.
- Registry book assembly11 Jun 2026US 2026/0158806 A1
- Stencil printer cover having movable door with closing feature4 Sep 2025US 2025/0276512 A1Illinois Tool Works Inc.
- Stencil printer2 Jan 2025US 2025/0001753 A1Illinois Tool Works Inc.
- Dual function tooling tray having movable center section for stencil printer7 Nov 2024US 2024/0367449 A1Illinois Tool Works Inc.
Most cited
By later US patents
- Prescription sheet and medication distribution system111US 4,799,712 APhysicians' Pharmaceutical Services, Inc. · 1989
- Stencil printer111US 5,953,985 ATohoku Ricoh Co., Ltd. · 1999
- Differential pressure sensitive adhesive joined business form102US 4,696,843 AUarco Incorporated · 1987
- Fanfolded tablet of a web which is separable into sheets each bearing a pressure-sensitive adhesive pattern96US 4,768,810 AMinnesota Mining and Manufacturing Company · 1988
- Business record having a multicolor imagable surface90US 5,524,934 AThe Standard Register Company · 1996