B21D 1/02
Straightening, restoring form or removing local distortions of sheet metal or specific
Official title: by rollers (B21D1/06 takes precedence)
B21D1/02 (Straightening, restoring form or removing local distortions of sheet metal or specific) appears on 161 US grants and 143 published applications in this corpus.
Search patents in B21D- Granted patents
- 161
- Published applications
- 143
- Assignees
- 124
- Inventors
- 380
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 5 | 0 |
| 1994 | 0 | 0 |
| 1995 | 5 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 2 |
| 2003 | 2 | 2 |
| 2004 | 2 | 3 |
| 2005 | 3 | 1 |
| 2006 | 3 | 2 |
| 2007 | 1 | 7 |
| 2008 | 2 | 6 |
| 2009 | 8 | 3 |
| 2010 | 0 | 6 |
| 2011 | 3 | 6 |
| 2012 | 6 | 6 |
| 2013 | 2 | 6 |
| 2014 | 3 | 5 |
| 2015 | 8 | 13 |
| 2016 | 7 | 6 |
| 2017 | 5 | 2 |
| 2018 | 4 | 17 |
| 2019 | 6 | 5 |
| 2020 | 5 | 10 |
| 2021 | 6 | 7 |
| 2022 | 6 | 6 |
| 2023 | 7 | 5 |
| 2024 | 2 | 10 |
| 2025 | 9 | 5 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Flattening device6 Oct 2026US 12,752,328 B2Contemporary Amperex Technology (Hong Kong) Limited
- Drawing and straightening unit for metal products, and corresponding method1 Sep 2026US 12,722,193 B2M. E. P. Macchine Elettroniche Piegatrici SpA
- Dynamic proportional-integral-derivative (PID) method for plate straightening based on changes in yield strength23 Dec 2025US 12,504,723 B2Taiyuan University of Science and Technology
- Press system and control method of press system4 Nov 2025US 12,459,029 B2Amada Company, Limited
- Device and method for leveling a metal plate21 Oct 2025US 12,447,519 B2Allor Manufacturing, Inc.
- Aluminum alloy plate and method for producing same6 Aug 2026US 2026/0225140 A1Uacj Corporation
- Method for multi-field coupling strengthening of an ice skate blade edge29 Jan 2026US 2026/0027609 A1Avic Manufacturing Technology Institute
- Roller offset forming tool and method of mitigating distortion in a metal sheet13 Nov 2025US 2025/0345837 A1GM Global Technology Operations LLC
- Laser assisted machining of sheet material14 Aug 2025US 2025/0256350 A1Ipg Photonics Corporation
- Jig for assisting attachment of rail cover22 May 2025US 2025/0163968 A1Thk Co., Ltd.
Most cited
By later US patents
- Roller leveler and method of operating same34US 4,454,738 APaxson Machine Company · 1984
- Leveling apparatus33US 4,635,458 AThe Monarch Machine Tool Company · 1987
- Apparatus for controlling flatness of metal sheet during rolling24US 4,033,165 ANippon Kokan Kabushiki Kaisha · 1977
- Hot leveller automation system21US 4,881,392 AIndustrial Automation Services Pty Ltd. · 1989
- Hydraulic contouring means for a hot or cold leveler machine20US 4,730,472 AUnited Engineering, Inc. · 1988