B21D 31/00
Working or processing of sheet metal or metal tubes, rods or profiles
Official title: Other methods for working sheet metal, metal tubes, metal profiles (deforming one surface of tubes helically by rolling B21H3/00; upsetting B21J5/08; working metal by removing material therefrom B23; embossing B44B)
B21D31/00 (Working or processing of sheet metal or metal tubes, rods or profiles) appears on 479 US grants and 411 published applications in this corpus.
Search patents in B21D- Granted patents
- 479
- Published applications
- 411
- Assignees
- 311
- Inventors
- 949
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 6 | 0 |
| 1978 | 9 | 0 |
| 1979 | 2 | 0 |
| 1980 | 7 | 0 |
| 1981 | 11 | 0 |
| 1982 | 5 | 0 |
| 1983 | 2 | 0 |
| 1984 | 8 | 0 |
| 1985 | 6 | 0 |
| 1986 | 6 | 0 |
| 1987 | 4 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 11 | 0 |
| 1993 | 5 | 0 |
| 1994 | 7 | 0 |
| 1995 | 6 | 0 |
| 1996 | 9 | 0 |
| 1997 | 9 | 0 |
| 1998 | 12 | 0 |
| 1999 | 8 | 0 |
| 2000 | 13 | 0 |
| 2001 | 8 | 6 |
| 2002 | 8 | 6 |
| 2003 | 7 | 7 |
| 2004 | 8 | 15 |
| 2005 | 10 | 9 |
| 2006 | 8 | 12 |
| 2007 | 4 | 8 |
| 2008 | 3 | 9 |
| 2009 | 3 | 13 |
| 2010 | 2 | 11 |
| 2011 | 7 | 14 |
| 2012 | 5 | 19 |
| 2013 | 13 | 29 |
| 2014 | 13 | 30 |
| 2015 | 19 | 24 |
| 2016 | 22 | 25 |
| 2017 | 26 | 19 |
| 2018 | 15 | 20 |
| 2019 | 19 | 26 |
| 2020 | 14 | 19 |
| 2021 | 19 | 23 |
| 2022 | 20 | 18 |
| 2023 | 26 | 14 |
| 2024 | 15 | 13 |
| 2025 | 12 | 14 |
| 2026 | 3 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for producing a recess using a bending machine, and bending machine configured for this purpose29 Sep 2026US 12,746,589 B2EVOBEND GmbH
- Composite punched screen for high pressure applications7 Apr 2026US 12,595,720 B2Variperm Energy Services Inc.
- Forming stylus tool design and toolpath generation module for 3 axis computer numerical control manufacturing processes7 Apr 2026US 12,596,345 B2The Boeing Company
- Device and method for continuously producing an at least partly hollow shaft having a varying inner and/or outer diameter23 Dec 2025US 12,502,705 B2MAGNA Powertrain AG & Co KG
- Edge band fine trimming mechanism of edge banding machine2 Sep 2025US 12,403,521 B2Oav Equipment & Tools, Inc.
- Method for manufacturing press formed article and die set design method13 Aug 2026US 2026/0233279 A1Jfe Steel Corporation
- Linear pass incremental sheet metal forming6 Aug 2026US 2026/0225146 A1Ohio State Innovation Foundation
- Expanding apparatus for manufacturing micro-expanded metal mesh foil sheets23 Jul 2026US 2026/0208254 A1ACS Industries, Inc.
- Expanding blade for use in manufacturing micro-expanded metal mesh foils and methods of fabricating the same23 Jul 2026US 2026/0208255 A1ACS Industries, Inc.
- Pre-tensioned battery shelf28 May 2026US 2026/0144369 A1Vertiv Corporation
Most cited
By later US patents
- Composite packaging material having an expanded sheet with a separator sheet104US 5,688,578 A1997
- Metal pipe expander94US 6,334,351 B12002
- Coining expanded metal positive lead-acid battery grids66US 3,947,936 AGeneral Motors Corporation · 1976
- Apparatus for making expanded metal lead-acid battery grids56US 3,945,097 AGeneral Motors Corporation · 1976
- Method and apparatus for making continuous grids for lead acid batteries55US 4,305,187 AYuasa Battery Co., Ltd. · 1981