B21D 51/02
Making hollow objects: characterised by the structure of the objects
Official title: characterised by the structure of the objects {(B21D51/26 takes precedence)}
B21D51/02 (Making hollow objects: characterised by the structure of the objects) appears on 198 US grants and 206 published applications in this corpus.
Search patents in B21D- Granted patents
- 198
- Published applications
- 206
- Assignees
- 172
- Inventors
- 518
- Latest grant
- 14 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 8 | 2 |
| 2002 | 1 | 3 |
| 2003 | 3 | 5 |
| 2004 | 4 | 1 |
| 2005 | 3 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 5 |
| 2010 | 1 | 9 |
| 2011 | 1 | 4 |
| 2012 | 2 | 9 |
| 2013 | 3 | 9 |
| 2014 | 4 | 13 |
| 2015 | 14 | 10 |
| 2016 | 9 | 8 |
| 2017 | 4 | 12 |
| 2018 | 5 | 12 |
| 2019 | 5 | 16 |
| 2020 | 14 | 18 |
| 2021 | 15 | 13 |
| 2022 | 13 | 17 |
| 2023 | 9 | 12 |
| 2024 | 12 | 7 |
| 2025 | 10 | 12 |
| 2026 | 0 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Press machine14 Oct 2025US 12,441,073 B2Asahi-Seiki Manufacturing Co., Ltd.
- Apparatus and method for production of duct members19 Aug 2025US 12,392,524 B2Cleveland Tool & Machine, Inc.
- Helically wound tubular structures22 Jul 2025US 12,366,310 B2Techreo LLC
- Container and method for producing a container15 Jul 2025US 12,358,684 B2
- Method of industrial centrifuge basket perforation8 Jul 2025US 12,350,688 B2The Western States Machine Company
- A method of reshaping a workpiece, a primary side pressing device, a secondary side pressing device and an arrangement for reshaping a workpiece3 Sep 2026US 2026/0257264 A1Stilfold AB
- Equipment and processes for sheet metal consolidation20 Aug 2026US 2026/0241437 A1Massachusetts Institute of Technology
- Two-piece metal can and manufacturing method thereof13 Aug 2026US 2026/0233289 A1Daiwa Can Company
- Automated sphere plate pressing method16 Jul 2026US 2026/0199948 A1CB&I STS Delaware LLC
- Cylindrical member and manufacturing method therefor9 Jul 2026US 2026/0192353 A1Nippon Steel Corporation
Most cited
By later US patents
- Methods for the manufacture of radially expansible stents748US 5,907,893 AMedtronic, Inc. · 1999
- Method for fabricating a planar eversible lattice which forms a stent when everted532US 6,327,772 B1Medtronic, Inc. · 2001
- Hydroformed tubular member and method of hydroforming tubular members48US 6,216,509 B1R. J. Tower Corporation · 2001
- Filler body for receptacles for combustible fluids and method of making same38US 4,613,054 A1986
- Process for the production of hollow ball bearings33US 5,659,956 A1997