B21D 11/02
Bending by stretching or pulling over a die
Official title: Bending by stretching or pulling over a die (working sheet metal of limited length by stretching B21D25/00)
B21D11/02 (Bending by stretching or pulling over a die) appears on 70 US grants and 65 published applications in this corpus.
Search patents in B21D- Granted patents
- 70
- Published applications
- 65
- Assignees
- 54
- Inventors
- 181
- Latest grant
- 2 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 2 |
| 2003 | 2 | 3 |
| 2004 | 2 | 1 |
| 2005 | 0 | 3 |
| 2006 | 1 | 0 |
| 2007 | 1 | 6 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 1 | 3 |
| 2011 | 1 | 2 |
| 2012 | 0 | 4 |
| 2013 | 2 | 4 |
| 2014 | 3 | 3 |
| 2015 | 4 | 4 |
| 2016 | 2 | 6 |
| 2017 | 4 | 0 |
| 2018 | 2 | 4 |
| 2019 | 3 | 3 |
| 2020 | 2 | 8 |
| 2021 | 3 | 2 |
| 2022 | 6 | 3 |
| 2023 | 3 | 0 |
| 2024 | 1 | 2 |
| 2025 | 3 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Forming a preform into a shaped body2 Dec 2025US 12,485,630 B2Goodrich Corporation
- Workpiece processing method and processing device25 Nov 2025US 12,479,018 B2Mitsubishi Heavy Industries, Ltd.
- Method for precision forming by continuous free bending27 May 2025US 12,311,424 B2Nanjing University of Aeronautics and Astronautics
- Structural member, structural member manufacturing method, and structural member manufacturing device9 Jul 2024US 12,030,105 B2Nippon Steel Corporation
- Forming a preform into a shaped body14 Nov 2023US 11,813,812 B1Rohr, Inc.
- Information processor, press machine system, and data generation method17 Sep 2026US 2026/0273605 A1Murata Machinery, Ltd.
- Modular attachments for a planishing hammer5 Jun 2025US 2025/0178062 A1
- A robotic tube bending machine11 Apr 2024US 2024/0116099 A1
- Forming a preform into a shaped body22 Feb 2024US 2024/0059035 A1Rohr, Inc.
- Method for precision forming by continuous free bending1 Dec 2022US 2022/0379362 A1Nanjing University of Aeronautics and Astronautics
Most cited
By later US patents
- Method and apparatus for forming a metal sheet under elevated temperature and air pressure69US 6,619,094 B2Airbus Deutschland GmbH · 2003
- Titanium stretch forming apparatus and method30US 8,037,730 B2Cyril Bath Company · 2011
- Apparatus and method for the stretch forming of elongated hollow metal sections27US 5,327,764 AAluminum Company of America · 1994
- Internal articulated mandrel for the stretch forming of elongated hollow metal sections20US 5,327,765 AAluminum Company of America · 1994
- Extrusion former with three-way powered movement16US 4,827,753 ACyril Bath Company · 1989