B21D 3/02
Straightening or restoring form of metal rods, metal tubes, metal profiles, or
Official title: by rollers
B21D3/02 (Straightening or restoring form of metal rods, metal tubes, metal profiles, or) appears on 173 US grants and 108 published applications in this corpus.
Search patents in B21D- Granted patents
- 173
- Published applications
- 108
- Assignees
- 125
- Inventors
- 339
- Latest grant
- 15 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 9 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 5 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 4 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 8 | 0 |
| 1992 | 6 | 0 |
| 1993 | 2 | 0 |
| 1994 | 5 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 1 |
| 2002 | 7 | 4 |
| 2003 | 0 | 2 |
| 2004 | 0 | 2 |
| 2005 | 2 | 2 |
| 2006 | 0 | 1 |
| 2007 | 1 | 3 |
| 2008 | 1 | 3 |
| 2009 | 1 | 3 |
| 2010 | 1 | 4 |
| 2011 | 4 | 3 |
| 2012 | 1 | 5 |
| 2013 | 3 | 2 |
| 2014 | 4 | 4 |
| 2015 | 2 | 7 |
| 2016 | 2 | 7 |
| 2017 | 7 | 2 |
| 2018 | 3 | 7 |
| 2019 | 4 | 7 |
| 2020 | 3 | 10 |
| 2021 | 8 | 8 |
| 2022 | 3 | 6 |
| 2023 | 9 | 5 |
| 2024 | 3 | 5 |
| 2025 | 7 | 4 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Metallic tubular products with enhanced collapse resistance15 Jul 2025US 12,358,038 B2United States Steel Corporation
- Stainless steel pipe and method for manufacturing same15 Jul 2025US 12,359,752 B2Jfe Steel Corporation
- Stainless steel pipe and method for manufacturing same17 Jun 2025US 12,331,371 B2Jfe Steel Corporation
- Multi-roll metal strip leveler3 Jun 2025US 12,318,830 B2Clecim
- Wire straightening device, wire processing device having the same, and wire straightening method11 Mar 2025US 12,246,373 B2Shinmaywa Industries, Ltd.
- Welding-wire-straightening apparatus6 Aug 2026US 2026/0225148 A1Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
- Magnesium alloy molded article and manufacturing method thereof3 Jul 2025US 2025/0215547 A1Massive Lab Inc.
- Apparatus and method for straightening a metal wire26 Jun 2025US 2025/0205766 A1M. E. P. Macchine Elettroniche Piegatrici SpA
- Measuring unit, and measuring method of measuring straightened wire-shaped or tubular material8 May 2025US 2025/0146814 A1WAFIOS Aktiengesellschaft
- Feeding system9 Jan 2025US 2025/0010358 A1WAFIOS Aktiengesellschaft
Most cited
By later US patents
- Wire straightener and method for straightening wire34US 4,464,919 A1984
- Method and apparatus for truing or straightening out of true work pieces25US 5,235,838 AW. Hegenscheidt Gesellschaft mbH · 1993
- Methods of fabricating mechanized welding wire21US 6,301,944 B1General Electric Company · 2001
- Roller levelling machine for levelling a rolled section20US 6,029,485 ASMS Schloeman-Siemag Aktiengesellschaft · 2000
- Section steel straightener with adjustable roller width18US 5,060,498 AKawasaki Steel Corporation · 1991