B21D 28/02
Punching blanks or articles with or without obtaining scrap
Official title: Punching blanks or articles with or without obtaining scrap (cutting nails or pins from strips or sheet material B21G3/26); Notching
B21D28/02 (Punching blanks or articles with or without obtaining scrap) appears on 1,048 US grants and 895 published applications in this corpus.
Search patents in B21D- Granted patents
- 1,048
- Published applications
- 895
- Assignees
- 559
- Inventors
- 1,948
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 18 | 0 |
| 1977 | 12 | 0 |
| 1978 | 9 | 0 |
| 1979 | 10 | 0 |
| 1980 | 18 | 0 |
| 1981 | 9 | 0 |
| 1982 | 13 | 0 |
| 1983 | 6 | 0 |
| 1984 | 14 | 0 |
| 1985 | 17 | 0 |
| 1986 | 19 | 0 |
| 1987 | 14 | 0 |
| 1988 | 11 | 0 |
| 1989 | 11 | 0 |
| 1990 | 18 | 0 |
| 1991 | 28 | 0 |
| 1992 | 12 | 0 |
| 1993 | 20 | 0 |
| 1994 | 21 | 0 |
| 1995 | 18 | 0 |
| 1996 | 16 | 0 |
| 1997 | 19 | 0 |
| 1998 | 18 | 0 |
| 1999 | 18 | 0 |
| 2000 | 20 | 0 |
| 2001 | 19 | 6 |
| 2002 | 11 | 15 |
| 2003 | 16 | 9 |
| 2004 | 8 | 21 |
| 2005 | 9 | 16 |
| 2006 | 20 | 18 |
| 2007 | 12 | 18 |
| 2008 | 15 | 31 |
| 2009 | 10 | 35 |
| 2010 | 12 | 18 |
| 2011 | 14 | 22 |
| 2012 | 26 | 34 |
| 2013 | 19 | 27 |
| 2014 | 27 | 27 |
| 2015 | 28 | 56 |
| 2016 | 27 | 36 |
| 2017 | 39 | 50 |
| 2018 | 33 | 52 |
| 2019 | 43 | 63 |
| 2020 | 42 | 68 |
| 2021 | 49 | 41 |
| 2022 | 54 | 44 |
| 2023 | 37 | 45 |
| 2024 | 37 | 49 |
| 2025 | 40 | 48 |
| 2026 | 12 | 46 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B21D 28/12Punching using rotatable carriers235
- B21D 28/06Making more than one part out of the same blank156
- B21D 28/22Notching the peripheries of circular blanks134
- B21D 28/10Incompletely punching in such a manner that the parts are still coherent132
- B21D 28/16Shoulder or burr prevention124
- B21D 28/14Dies106
- B21D 28/04Centering the work77
- B21D 28/20Applications of drives for reducing noise or wear59
All 9 subgroupsShow fewer
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Most cited
By later US patents
- Method for manufacturing long, slender lamina stack from nonuniform laminae118US 6,163,949 AL. H. Carbide Corporation · 2000
- Techniques for designing and manufacturing precision-folded, high strength, fatigue-resistant structures and sheet therefor61US 7,032,426 B2Industrial Origami, Inc. · 2006
- Techniques for designing and manufacturing precision-folded, high strength, fatigue-resistant structures and sheet therefor60US 7,152,449 B2Industrial Origami, Inc. · 2006
- Apparatus for manufacture of laminated parts52US 4,619,028 AL. H. Carbide Corporation · 1986
- Computer controlled machine for punching and thermal cutting of workpieces51US 4,698,480 ATrumpf GmbH & Co. · 1987