B21D 28/246
Selection of punches
Official title: {Selection of punches}
B21D28/246 (Selection of punches) appears on 53 US grants and 33 published applications in this corpus.
Search patents in B21D- Granted patents
- 53
- Published applications
- 33
- Assignees
- 36
- Inventors
- 90
- Latest grant
- 20 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 4 |
| 2003 | 2 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 2 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 2 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 3 | 1 |
| 2015 | 1 | 2 |
| 2016 | 0 | 1 |
| 2017 | 3 | 1 |
| 2018 | 2 | 1 |
| 2019 | 0 | 2 |
| 2020 | 0 | 2 |
| 2021 | 2 | 1 |
| 2022 | 0 | 2 |
| 2023 | 1 | 4 |
| 2024 | 2 | 2 |
| 2025 | 1 | 3 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Plate holder for perforation press and method for moving plate holder20 Jan 2026US 12,528,112 B2Soenen Technology NV
- Sheet metal working machine14 Jan 2025US 12,194,525 B2Salvagnini Italia S.p.A.
- Punching/perforating machine22 Oct 2024US 12,121,952 B2WISTA Werkzeugfertigungs-GmbH
- Procedure for hardening slides of a perforating press and the slides obtained8 Oct 2024US 12,110,565 B2Soenen Technology NV
- System and method for flexible manufacturing28 Mar 2023US 11,612,927 B2ATS Automation Tooling Systems Inc.
- Laminated core and manufacturing method for the same25 Dec 2025US 2025/0392174 A1Posco Mobility Solution Corporation
- Forming punching apparatus20 Nov 2025US 2025/0353066 A1Salvagnini Italia S.p.A.
- Knockout Punch Tool with Draw Stud29 May 2025US 2025/0170635 A1Milwaukee Electric Tool Corporation
- Die test/inspection apparatus22 Aug 2024US 2024/0280442 A1Corrada S.p.A.
- Punching/perforating machine11 Jan 2024US 2024/0009726 A1WISTA Werkzeugfertigungs-GmbH
Most cited
By later US patents
- Method for manufacturing long, slender lamina stack from nonuniform laminae118US 6,163,949 AL. H. Carbide Corporation · 2000
- Apparatus and method for forming templates36US 4,151,768 A1979
- Punch press with tool changer35US 5,669,866 AW. A. Whitney Corp. · 1997
- Lamina stack having a plurality of outer perimeter configurations and an apparatus and method for manufacturing said stack34US 5,799,387 AL.H. Carbide Corpordation · 1998
- Machine having a plurality of reciprocating working tools which may be selectively brought into operation30US 4,220,062 ATrumpf Maschinen AG · 1980