B41K
Stamps
Official title: STAMPS; STAMPING OR NUMBERING APPARATUS OR DEVICES (marking meat A22C17/10; embossing combined with printing B41F19/00; selective printing mechanisms B41J; embossing decorations or marks B44B5/00; marking or coding completed packages B65B61/26; ticket printing and issuing, fare registering, nonprinting aspects of franking apparatus G07B)
B41K (Stamps) appears on 1,149 US grants and 541 published applications in this corpus.
Search patents in B41K- Granted patents
- 1,149
- Published applications
- 541
- Assignees
- 420
- Inventors
- 1,382
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 32 | 0 |
| 1977 | 41 | 0 |
| 1978 | 33 | 0 |
| 1979 | 27 | 0 |
| 1980 | 35 | 0 |
| 1981 | 39 | 0 |
| 1982 | 36 | 0 |
| 1983 | 39 | 0 |
| 1984 | 31 | 0 |
| 1985 | 23 | 0 |
| 1986 | 30 | 0 |
| 1987 | 25 | 0 |
| 1988 | 19 | 0 |
| 1989 | 35 | 0 |
| 1990 | 20 | 0 |
| 1991 | 23 | 0 |
| 1992 | 21 | 0 |
| 1993 | 21 | 0 |
| 1994 | 19 | 0 |
| 1995 | 22 | 0 |
| 1996 | 15 | 0 |
| 1997 | 23 | 0 |
| 1998 | 45 | 0 |
| 1999 | 27 | 0 |
| 2000 | 24 | 0 |
| 2001 | 22 | 6 |
| 2002 | 15 | 15 |
| 2003 | 12 | 12 |
| 2004 | 19 | 20 |
| 2005 | 20 | 21 |
| 2006 | 17 | 30 |
| 2007 | 10 | 20 |
| 2008 | 13 | 23 |
| 2009 | 7 | 18 |
| 2010 | 13 | 29 |
| 2011 | 18 | 19 |
| 2012 | 20 | 16 |
| 2013 | 12 | 26 |
| 2014 | 8 | 21 |
| 2015 | 21 | 27 |
| 2016 | 30 | 37 |
| 2017 | 21 | 22 |
| 2018 | 23 | 30 |
| 2019 | 19 | 28 |
| 2020 | 25 | 20 |
| 2021 | 24 | 30 |
| 2022 | 24 | 16 |
| 2023 | 12 | 23 |
| 2024 | 12 | 15 |
| 2025 | 15 | 10 |
| 2026 | 12 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- B41K 1/00Portable hand-operated devices without means for supporting or locating the articles to632
- B41K 3/00Apparatus for stamping articles having integral means for supporting the articles to543
- B41K 5/00Plier-like tools for stamping, or stamping and delivering, tickets or the like54
- B41K 99/00Subject matter not provided for in other groups of this subclass6
Recent patents
- Positioning aid for a stamping tool18 Aug 2026US 12,709,111 B1
- Numbering unit with universal lower part for vertical and horizontal numbering units21 Jul 2026US 12,686,222 B2Zeisergmbh
- Clamping fixation of numbering units30 Jun 2026US 12,668,074 B2Zeiser GmbH
- Stamp with a cutting device and method for using a cutting device23 Jun 2026US 12,661,814 B2Trodat GmbH
- Stamp having a tilting holding frame19 May 2026US 12,629,950 B2Sun Same Enterprises Co., Ltd.
- Self-inking stamp with reinforced crossbar20 Aug 2026US 2026/0241731 A1Colop Stempelerzeugung Skopek Gesellschaft M.B.H. & Co. KG.
- Positioning aid for a stamping tool20 Aug 2026US 2026/0241732 A1
- Multifunctional opening tool11 Jun 2026US 2026/0158685 A1
- Character-printing vacuum sealer and sealing method using this character-printing vacuum sealer23 Apr 2026US 2026/0109505 A1Ningbo Kedly Appliance Industry Co., Ltd.
- Stamp with cutting element19 Feb 2026US 2026/0048603 A1Sun Same Enterprises Co., Ltd.
Most cited
By later US patents
- Stamp for a lithographic process159US 5,817,242 AInternational Business Machines.Corp · 1998
- Apparatus and methods for micro-transfer-printing144US 9,358,775 B2X-Celeprint Limited · 2016
- Printing apparatus and printing cartridge therefor136US 4,402,619 AKroy Inc. · 1983
- Tape-ribbon printing cartridge106US 4,391,539 AKroy Inc. · 1983
- Printing cartridge102US 4,226,547 AKroy Industries Inc. · 1980