B21C 37/151
Making tubes with multiple passages
Official title: {Making tubes with multiple passages}
B21C37/151 (Making tubes with multiple passages) appears on 144 US grants and 127 published applications in this corpus.
Search patents in B21C- Granted patents
- 144
- Published applications
- 127
- Assignees
- 96
- Inventors
- 341
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 3 | 0 |
| 1998 | 6 | 0 |
| 1999 | 6 | 0 |
| 2000 | 5 | 0 |
| 2001 | 8 | 6 |
| 2002 | 4 | 7 |
| 2003 | 10 | 2 |
| 2004 | 3 | 6 |
| 2005 | 4 | 2 |
| 2006 | 3 | 8 |
| 2007 | 0 | 8 |
| 2008 | 3 | 4 |
| 2009 | 1 | 13 |
| 2010 | 7 | 6 |
| 2011 | 2 | 4 |
| 2012 | 4 | 5 |
| 2013 | 5 | 11 |
| 2014 | 5 | 1 |
| 2015 | 2 | 3 |
| 2016 | 1 | 3 |
| 2017 | 0 | 1 |
| 2018 | 5 | 0 |
| 2019 | 2 | 0 |
| 2020 | 2 | 9 |
| 2021 | 3 | 7 |
| 2022 | 4 | 8 |
| 2023 | 5 | 7 |
| 2024 | 7 | 3 |
| 2025 | 1 | 1 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Vehicle front rail11 Aug 2026US 12,703,427 B2Shape Corp.
- Aluminum alloy extruded multi-hole tube for heat exchanger and method for manufacturing the same28 Oct 2025US 12,454,741 B2Uacj Corporation
- Hydroforming of aluminum extrusions for automotive battery tray structures10 Dec 2024US 12,162,058 B2Magna International Inc.
- Extruded material and method for producing the same10 Sep 2024US 12,083,570 B2Kobe Steel, Ltd.
- Thin heat dissipation device and method for manufacturing the same30 Apr 2024US 11,974,411 B2
- Method for Producing a Folded Flat Tube23 Jul 2026US 2026/0208279 A1Mahle International GmbH
- Method for manufacturing a multi-chamber profile and multi-chamber profile4 Jun 2026US 2026/0151815 A1
- A flat tube for a heat exchanger4 Sep 2025US 2025/0277635 A1Valeo Klimasysteme GmbH
- Extruded, multi-hole-pipe and manufacturing method thereof21 Nov 2024US 2024/0384817 A1Uacj Corporation
- Pre-stretching roller, method of manufacturing the pre-stretching roller and winding apparatus18 Jul 2024US 2024/0239629 A1Robopac S.P.A.
Most cited
By later US patents
- Metal coiled tubing with signal transmitting passageway94US 5,542,472 ACamco International Inc. · 1996
- Multiple piece tube assembly for use in heat exchangers59US 4,805,693 AModine Manufacturing Company · 1989
- Heat pipe and method for processing the same39US 6,725,910 B2Diamond Electric Mfg. Co., Ltd. · 2004
- Folded tube for a heat exchanger and method of making same35US 6,209,202 B1Visteon Global Technologies, Inc. · 2001
- Heat exchange element30US 5,551,504 APackless Metal Hose, Inc. · 1996