B21D 28/24
Perforating, i.e. punching holes
B21D28/24 (Perforating, i.e. punching holes) appears on 1,222 US grants and 1,093 published applications in this corpus.
Search patents in B21D- Granted patents
- 1,222
- Published applications
- 1,093
- Assignees
- 683
- Inventors
- 2,236
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 26 | 0 |
| 1977 | 18 | 0 |
| 1978 | 24 | 0 |
| 1979 | 15 | 0 |
| 1980 | 10 | 0 |
| 1981 | 19 | 0 |
| 1982 | 5 | 0 |
| 1983 | 14 | 0 |
| 1984 | 12 | 0 |
| 1985 | 14 | 0 |
| 1986 | 18 | 0 |
| 1987 | 19 | 0 |
| 1988 | 16 | 0 |
| 1989 | 9 | 0 |
| 1990 | 14 | 0 |
| 1991 | 17 | 0 |
| 1992 | 14 | 0 |
| 1993 | 14 | 0 |
| 1994 | 16 | 0 |
| 1995 | 14 | 0 |
| 1996 | 11 | 0 |
| 1997 | 18 | 0 |
| 1998 | 27 | 0 |
| 1999 | 34 | 0 |
| 2000 | 24 | 0 |
| 2001 | 29 | 7 |
| 2002 | 21 | 29 |
| 2003 | 22 | 19 |
| 2004 | 25 | 30 |
| 2005 | 12 | 30 |
| 2006 | 34 | 39 |
| 2007 | 22 | 25 |
| 2008 | 17 | 32 |
| 2009 | 13 | 43 |
| 2010 | 20 | 35 |
| 2011 | 13 | 38 |
| 2012 | 27 | 37 |
| 2013 | 26 | 39 |
| 2014 | 22 | 30 |
| 2015 | 27 | 42 |
| 2016 | 31 | 38 |
| 2017 | 40 | 57 |
| 2018 | 31 | 55 |
| 2019 | 52 | 75 |
| 2020 | 50 | 72 |
| 2021 | 56 | 57 |
| 2022 | 49 | 58 |
| 2023 | 49 | 51 |
| 2024 | 64 | 56 |
| 2025 | 29 | 63 |
| 2026 | 19 | 36 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for producing a motor vehicle component by hot-forming with integrated cut8 Sep 2026US 12,728,453 B2Benteler Automobiltechnik GmbH
- Method and device for perforating a pipe wall25 Aug 2026US 12,715,029 B2T-Drill Oy
- System for accurately punching holes in a profile and its method18 Aug 2026US 12,708,936 B2Soenen Technology NV
- Machining tool for box-end wrench and method of machining box-end wrench by using the same28 Jul 2026US 12,691,508 B2
- Workpiece transport device23 Jun 2026US 12,661,704 B2Toyota Boshoku Kabushiki Kaisha
- Electrode shearing apparatus8 Oct 2026US 2026/0307132 A1Samsung SDI.Co., Ltd.
- Punch press die-closing adjustment mechanism10 Sep 2026US 2026/0264131 A1National Kaohsiung University of Science and Technology
- Method for measuring flatness deviations and curvature directions of components in a punching machine3 Sep 2026US 2026/0259030 A1TRUMPF Werkzeugmaschinen GmbH + Co. KG
- Method of manufacturing low-cost and high-strength thermoelectric module with simplified manufacturing process27 Aug 2026US 2026/0255876 A1Rmaterials Corporation
- Precision feed and guide system for sub-100 micron thickness metal foil sheets13 Aug 2026US 2026/0233285 A1ACS Industries, Inc.
Most cited
By later US patents
- Method for manufacturing long, slender lamina stack from nonuniform laminae118US 6,163,949 AL. H. Carbide Corporation · 2000
- Piercing apparatus104US 4,038,894 ASpringfield Tool & Die, Inc. · 1977
- Quick change adjustable punch tool assembly and method of adjustment54US 6,047,621 AElba Electronetics, Inc. · 2000
- Apparatus and method for forming a tubular member53US 5,481,892 A1996
- Computer controlled machine for punching and thermal cutting of workpieces51US 4,698,480 ATrumpf GmbH & Co. · 1987