B21D 39/02
Application of procedures in order to connect objects or parts: of sheet
Official title: of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder
B21D39/02 (Application of procedures in order to connect objects or parts: of sheet) appears on 562 US grants and 485 published applications in this corpus.
Search patents in B21D- Granted patents
- 562
- Published applications
- 485
- Assignees
- 313
- Inventors
- 1,091
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 8 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 5 | 0 |
| 1983 | 5 | 0 |
| 1984 | 6 | 0 |
| 1985 | 8 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 7 | 0 |
| 1992 | 10 | 0 |
| 1993 | 12 | 0 |
| 1994 | 5 | 0 |
| 1995 | 5 | 0 |
| 1996 | 9 | 0 |
| 1997 | 6 | 0 |
| 1998 | 14 | 0 |
| 1999 | 11 | 0 |
| 2000 | 18 | 0 |
| 2001 | 15 | 5 |
| 2002 | 19 | 15 |
| 2003 | 20 | 12 |
| 2004 | 10 | 13 |
| 2005 | 13 | 15 |
| 2006 | 13 | 24 |
| 2007 | 9 | 12 |
| 2008 | 7 | 26 |
| 2009 | 9 | 18 |
| 2010 | 13 | 15 |
| 2011 | 18 | 19 |
| 2012 | 17 | 25 |
| 2013 | 14 | 20 |
| 2014 | 17 | 18 |
| 2015 | 20 | 29 |
| 2016 | 20 | 23 |
| 2017 | 28 | 25 |
| 2018 | 20 | 20 |
| 2019 | 15 | 31 |
| 2020 | 18 | 20 |
| 2021 | 15 | 13 |
| 2022 | 12 | 18 |
| 2023 | 20 | 12 |
| 2024 | 18 | 19 |
| 2025 | 15 | 26 |
| 2026 | 9 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
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- Method of manufacturing formed product25 Aug 2026US 12,715,030 B2Futaba Industrial Co., Ltd.
- Composite carbon nanotube structures16 Jun 2026US 12,655,535 B2
- Sheet metal hammer with drive manipulation feature5 May 2026US 12,617,063 B2Ocd Innovations, LLC
- Composite punched screen for high pressure applications7 Apr 2026US 12,595,720 B2Variperm Energy Services Inc.
- Stand and Seam Hemmer for Metal Roof Installations1 Oct 2026US 2026/0297952 A1
- Hot-stamped product and method of producing the same27 Aug 2026US 2026/0249343 A1Nippon Steel Corporation
- Vehicle door aperture assembly27 Aug 2026US 2026/0249920 A1
- Aluminum blanks with reinforcement patches6 Aug 2026US 2026/0225143 A1Magna International Inc.
- Longitudinal chamber profile preform and method23 Jul 2026US 2026/0208253 A1Zieta Prozessdesign SpóLka Z Ograniczona Odpowiedzialnoscia
Most cited
By later US patents
- Flanging device and flanging method with component protection129US 7,500,373 B2EDAG GmbH & Co. KGaA · 2009
- Roller folding head122US 7,152,292 B2EDAG Engineering & Design AG · 2006
- Flanging with a leading and following flanging die122US 7,637,134 B2EDAG GmbH & Co. KGaA · 2009
- Edge curling tool120US 8,408,036 B2FFT EDAG Produktionssysteme GmbH & Co. KG · 2013
- Sheet-metal composite, method for joining sheets and joining device120US 9,006,605 B2Fft Produktionssysteme GmbH & Co. KG · 2015