B21D 25/00
Working sheet metal of limited length by stretching
Official title: Working sheet metal of limited length by stretching, e.g. for straightening
B21D25/00 (Working sheet metal of limited length by stretching) appears on 147 US grants and 119 published applications in this corpus.
Search patents in B21D- Granted patents
- 147
- Published applications
- 119
- Assignees
- 102
- Inventors
- 352
- Latest grant
- 26 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 6 | 0 |
| 2001 | 5 | 0 |
| 2002 | 1 | 7 |
| 2003 | 4 | 1 |
| 2004 | 6 | 4 |
| 2005 | 1 | 2 |
| 2006 | 2 | 0 |
| 2007 | 2 | 5 |
| 2008 | 2 | 2 |
| 2009 | 1 | 3 |
| 2010 | 3 | 4 |
| 2011 | 3 | 7 |
| 2012 | 0 | 1 |
| 2013 | 2 | 10 |
| 2014 | 3 | 4 |
| 2015 | 8 | 8 |
| 2016 | 4 | 10 |
| 2017 | 7 | 7 |
| 2018 | 6 | 9 |
| 2019 | 7 | 8 |
| 2020 | 7 | 8 |
| 2021 | 7 | 4 |
| 2022 | 3 | 2 |
| 2023 | 7 | 6 |
| 2024 | 4 | 3 |
| 2025 | 1 | 0 |
| 2026 | 0 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Pulse current processing apparatus and method for thin metal strip under bidirectional tension26 Aug 2025US 12,398,440 B2Taiyuan University of Technology
- Device for stretching a metal semi-finished product in the form of individual plates along a stretching section with a stretching frame, and method for stretching a metal semi-finished product using the device22 Oct 2024US 12,121,951 B2SMS group GmbH
- Stretching machine for extruded profiles8 Oct 2024US 12,109,602 B2Danieli & C. Officine Meccaniche SpA
- Aerodynamic component for a gas turbine engine12 Mar 2024US 11,927,348 B2Rtx Corporation
- Panel flattening assembly and display module including the same23 Jan 2024US 11,878,332 B2Samsung Display Co., Ltd.
- Method for manufacturing non-stick pan liner20 Aug 2026US 2026/0241438 A1Joyoung Company Limited
- Sheet metal drawing machine25 Jun 2026US 2026/0175276 A1Acb
- Pouch-Shaped Battery Case Shaping Apparatus, Pouch-Shaped Battery Case Manufactured Using the Same, and Method of Shaping Cup Portion of Pouch-Shaped Battery Case Using the Pouch-Shaped Battery Case Shaping Apparatus18 Jun 2026US 2026/0171557 A1LG Energy Solution, Ltd.
- Pre-tensioned battery shelf28 May 2026US 2026/0144369 A1Vertiv Corporation
- Modular Stretch Block Using Additive Manufacturing5 Sep 2024US 2024/0293859 A1Textron Aviation Inc.
Most cited
By later US patents
- Clamp77US 3,986,746 AGuy-Chart Tools Limited · 1976
- Method and apparatus for forming a metal sheet under elevated temperature and air pressure69US 6,619,094 B2Airbus Deutschland GmbH · 2003
- Working of a metallic strip37US 6,063,216 ATrico Products Corporation · 2000
- Block-set form die assembly32US 6,053,026 ANorthrop Grumman Corporation · 2000
- Titanium stretch forming apparatus and method30US 8,037,730 B2Cyril Bath Company · 2011