B21J 7/30
Operated by electro-magnets
Official title: operated by electro-magnets
B21J7/30 (Operated by electro-magnets) appears on 15 US grants and 6 published applications in this corpus.
Search patents in B21J- Granted patents
- 15
- Published applications
- 6
- Assignees
- 9
- Inventors
- 18
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 2 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Methods of material forming and/or cutting28 Apr 2026US 12,611,706 B2Cell Impact AB
- Forging hammer having an electric linear drive24 Aug 2021US 11,097,334 B2Langenstein & Schemann GmbH
- Forming machine, in particular a forging hammer21 May 2019US 10,293,398 B2Langenstein & Schemann GmbH
- Riveting device and riveting method28 Jun 2016US 9,375,781 B2Airbus Operations GmbH
- Opposed current flow magnetic pulse forming and joining system8 Jul 2008US 7,395,597 B2Edison Welding Institute, Inc.
- Methods of and apparatuses for metal forming and/or cutting24 Nov 2022US 2022/0371072 A1Cell Impact AB
- Forming Machine, in Particular a Forging Hammer18 Oct 2018US 2018/0297105 A1Langenstein & Schemann GmbH
- Forging Hammer Having an Electric Linear Drive29 Mar 2018US 2018/0085820 A1Langenstein & Schemann GmbH
- Riveting device and riveting method16 Oct 2014US 2014/0304972 A1Airbus Operations GmbH
- Opposed current flow magnetic pulse forming and joining system24 Aug 2006US 2006/0185412 A1Edison Welding Institute, Inc.
Most cited
By later US patents
- Method of welding metals using stress waves35US 3,961,739 AGrumman Aerospace Corporation · 1976
- Electromagnetic high energy impact apparatus27US 4,128,000 AThe Boeing Company · 1978
- Recoil assembly for electromagnetic high energy impact apparatus27US 4,151,735 AThe Boeing Company · 1979
- Ram assembly for electromagnetic high energy impact apparatus24US 4,132,108 AThe Boeing Company · 1979
- Method and apparatus for working a hole20US 4,129,028 AGrumman Aerospace Corporation · 1978