B23K 2101/04
Tubular or hollow articles
B23K2101/04 (Tubular or hollow articles) appears on 2,702 US grants and 3,201 published applications in this corpus.
Search patents in B23K- Granted patents
- 2,702
- Published applications
- 3,201
- Assignees
- 1,605
- Inventors
- 7,077
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 3 | 0 |
| 1978 | 7 | 0 |
| 1979 | 8 | 0 |
| 1980 | 12 | 0 |
| 1981 | 5 | 0 |
| 1982 | 11 | 0 |
| 1983 | 4 | 0 |
| 1984 | 5 | 0 |
| 1985 | 10 | 0 |
| 1986 | 10 | 0 |
| 1987 | 19 | 0 |
| 1988 | 17 | 0 |
| 1989 | 14 | 0 |
| 1990 | 5 | 0 |
| 1991 | 4 | 0 |
| 1992 | 10 | 0 |
| 1993 | 5 | 0 |
| 1994 | 27 | 0 |
| 1995 | 23 | 0 |
| 1996 | 31 | 0 |
| 1997 | 40 | 0 |
| 1998 | 46 | 0 |
| 1999 | 47 | 0 |
| 2000 | 52 | 0 |
| 2001 | 77 | 35 |
| 2002 | 73 | 87 |
| 2003 | 86 | 72 |
| 2004 | 60 | 100 |
| 2005 | 72 | 94 |
| 2006 | 51 | 111 |
| 2007 | 44 | 90 |
| 2008 | 35 | 104 |
| 2009 | 33 | 118 |
| 2010 | 61 | 133 |
| 2011 | 55 | 114 |
| 2012 | 72 | 113 |
| 2013 | 90 | 114 |
| 2014 | 78 | 116 |
| 2015 | 101 | 139 |
| 2016 | 96 | 144 |
| 2017 | 94 | 186 |
| 2018 | 112 | 177 |
| 2019 | 155 | 190 |
| 2020 | 157 | 168 |
| 2021 | 126 | 182 |
| 2022 | 121 | 161 |
| 2023 | 132 | 156 |
| 2024 | 115 | 130 |
| 2025 | 117 | 93 |
| 2026 | 66 | 74 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Manufacturing method for heat exchanger6 Oct 2026US 12,752,357 B2Daikin Industries, Ltd.
- Tank, in particular for a liquid hydrogen reservoir, provided with at least one dome fixed by way of an outer welded joint6 Oct 2026US 12,753,882 B2Airbus Operations GmbH
- Parallel robotics system and method of induction kinetic hybrid welding processes29 Sep 2026US 12,746,626 B2Spinduction Weld, Inc.
- Systems, tools and methods for well decommissioning29 Sep 2026US 12,747,646 B2Foro Energy, Inc.
- Method and automatic brazing apparatus for flame brazing control in copper-aluminum welding15 Sep 2026US 12,734,599 B2Shaoxing Daishin Xinrui Brazing Equipment Co., Ltd.
- Steel pipe out-of-roundness prediction method, steel pipe out-of-roundness control method, steel pipe manufacturing method, steel pipe out-of-roundness prediction model generation method, and steel pipe out-of-roundness prediction device8 Oct 2026US 2026/0307127 A1Jfe Steel Corporation
- Seam position detection method, manufacturing method of welded steel pipe, quality control method of welded steel pipe, seam position detection apparatus, and manufacturing equipment of welded steel pipe8 Oct 2026US 2026/0307128 A1Jfe Steel Corporation
- Weld cap and plug welds for fluid delivery systems8 Oct 2026US 2026/0309168 A1Compart Systems Pte. Ltd.
- Laser treatment facility for applying laser treatment to a container1 Oct 2026US 2026/0295724 A1Sidel Participations
- Device and method for welding half sheets to form a bipolar plate1 Oct 2026US 2026/0295738 A1Schaeffler Technologies AG & Co. KG
Most cited
By later US patents
- Forming structures from CAD solid models580US 6,391,251 B1Optomec Design Company · 2002
- Friction stir welding method, frame members used therein, and product formed thereby151US 6,050,474 AHitachi, Ltd. · 2000
- Heat exchanger141US 6,964,296 B2Modine Manufacturing Company · 2005
- Method and apparatus for a combined mechanical and metallurgical connection139US 6,419,147 B12002
- Pulsed fiber laser cutting system for medical implants132US 6,521,865 B1Advanced Cardiovascular Systems, Inc. · 2003