B21K 23/04
Flanged articles
Official title: flanged articles (B21K1/28 takes precedence; flanging tubes B21D)
B21K23/04 (Flanged articles) appears on 86 US grants and 46 published applications in this corpus.
Search patents in B21K- Granted patents
- 86
- Published applications
- 46
- Assignees
- 72
- Inventors
- 157
- Latest grant
- 10 Sep 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 6 | 0 |
| 2001 | 0 | 1 |
| 2002 | 4 | 2 |
| 2003 | 4 | 1 |
| 2004 | 4 | 4 |
| 2005 | 1 | 3 |
| 2006 | 1 | 0 |
| 2007 | 3 | 5 |
| 2008 | 1 | 0 |
| 2009 | 0 | 2 |
| 2010 | 0 | 2 |
| 2011 | 3 | 3 |
| 2012 | 1 | 2 |
| 2013 | 0 | 2 |
| 2014 | 3 | 3 |
| 2015 | 2 | 4 |
| 2016 | 1 | 1 |
| 2017 | 5 | 0 |
| 2018 | 0 | 2 |
| 2019 | 0 | 1 |
| 2020 | 2 | 3 |
| 2021 | 1 | 2 |
| 2022 | 0 | 0 |
| 2023 | 3 | 1 |
| 2024 | 2 | 1 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for forming hitch ball head10 Sep 2024US 12,083,583 B2Chuen Chao Enterprises Co., Ltd.
- Check valve unit and air-conditioning apparatus, and method for manufacturing check valve unit23 Jan 2024US 11,879,556 B2Mitsubishi Electric Corporation
- Cold formed, dual seal anchor and method of making14 Nov 2023US 11,813,663 B2Hohmann & Barnard, Inc.
- Ball pen tip manufacturing machines, ball pen tips, and ball pens30 May 2023US 11,660,905 B2Kotobuki & Co., Ltd.
- Shaft diameter enlargement condition setting method, shaft diameter enlargement method and shaft diameter enlargement apparatus31 Jan 2023US 11,565,307 B2Neturen Co., Ltd.
- Method for manufacturing a monolithic component13 Mar 2025US 2025/0083835 A1
- Method for forming hitch ball head23 May 2024US 2024/0165694 A1Chuen Chao Enterprises Co., Ltd.
- Check valve unit and air-conditioning apparatus, and method for manufacturing check valve unit25 May 2023US 2023/0160481 A1Mitsubishi Electric Corporation
- Cold formed, dual seal anchor and method of making23 Dec 2021US 2021/0394256 A1Hohmann & Barnard, Inc.
- Methods for manufacturing ball pen tips, ball pen tip manufacturing machines, ball pen tips and ball pens11 Mar 2021US 2021/0070094 A1Kotobuki & Co., Ltd.
Most cited
By later US patents
- Method and apparatus for producing a stepped hollow article53US 4,580,431 AHitachi, Ltd. · 1986
- Method and apparatus for forming elongated articles having reduced diameter cross-sections44US 4,300,378 A1981
- Swaging appartus with a tubular boss having axially extending surface irregularities and swaging technique for thin actuator arm assemblies40US 5,717,545 AInternational Business Machines Corporation · 1998
- Pipe unions36US 4,362,043 A1982
- Method and apparatus for producing thin walled tubular product with thick walled flange25US 7,171,838 B22007