B21D 3/16
Straightening or restoring form of metal rods, metal tubes, metal profiles, or
Official title: of specific articles made from metal rods, tubes, or profiles, e.g. crankshafts, by specially adapted methods or means
B21D3/16 (Straightening or restoring form of metal rods, metal tubes, metal profiles, or) appears on 90 US grants and 73 published applications in this corpus.
Search patents in B21D- Granted patents
- 90
- Published applications
- 73
- Assignees
- 67
- Inventors
- 198
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 1 |
| 2002 | 2 | 0 |
| 2003 | 0 | 2 |
| 2004 | 1 | 4 |
| 2005 | 3 | 2 |
| 2006 | 1 | 2 |
| 2007 | 2 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 4 |
| 2012 | 1 | 2 |
| 2013 | 1 | 7 |
| 2014 | 3 | 5 |
| 2015 | 8 | 6 |
| 2016 | 3 | 5 |
| 2017 | 8 | 6 |
| 2018 | 5 | 2 |
| 2019 | 2 | 2 |
| 2020 | 1 | 7 |
| 2021 | 1 | 6 |
| 2022 | 6 | 4 |
| 2023 | 7 | 2 |
| 2024 | 3 | 2 |
| 2025 | 1 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems and methods for deformation correction of a gas turbine shroud26 May 2026US 12,636,694 B2GE Vernova Infrastructure Technology LLC
- Steel material for a torsionally stressed component, method for producing a torsionally stressed component from said steel material, and component made thereof30 Sep 2025US 12,428,693 B2Mannesmann Precision Tubes GmbH
- Guitar bridge straightening apparatus and method10 Sep 2024US 12,087,257 B2
- Device and method for opening folded heat exchanger cores6 Feb 2024US 11,890,663 B2Mahle International GmbH
- Gripping device23 Jan 2024US 11,878,336 B2Hinterkopf GmbH
- Drill Bit Straightening System20 Jun 2024US 2024/0198404 A1Marmon Holdings, Inc.
- Systems and methods for deformation correction of a gas turbine shroud16 May 2024US 2024/0157424 A1General Electric Company
- Surface reforming device and method thereof14 Sep 2023US 2023/0286028 A1National Tsing Hua University
- Assembly and method for on-site pressing of hydroelectric generator field poles12 Jan 2023US 2023/0011857 A1ANDRITZ HYDRO GmbH
- Guitar Bridge Straightening Apparatus and Method20 Oct 2022US 2022/0335912 A1
Most cited
By later US patents
- Fixture for holding metals parts for bending or twist correction22US 6,959,572 B2ProEnterpriz, Inc. · 2005
- Automatic process and aligning apparatus having a plurality of aligning stations19US 3,948,076 AEitel KG., Werkzeugmaschinenfabrik · 1976
- Bending and straightening mechanism for mine roof bolts14US 4,085,492 ATools for Bending, Inc. · 1978
- Apparatus for testing and straightening arrow shafts and the like11US 4,203,308 A1980
- Ball-bat repairing method11US 6,234,000 B12001