B21C 37/124
The tubes having a special shape
Official title: {the tubes having a special shape, e.g. with corrugated wall, flexible tubes}
B21C37/124 (The tubes having a special shape) appears on 115 US grants and 73 published applications in this corpus.
Search patents in B21C- Granted patents
- 115
- Published applications
- 73
- Assignees
- 58
- Inventors
- 151
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 4 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 5 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 2 |
| 2002 | 4 | 4 |
| 2003 | 1 | 1 |
| 2004 | 1 | 2 |
| 2005 | 0 | 1 |
| 2006 | 2 | 2 |
| 2007 | 1 | 4 |
| 2008 | 4 | 5 |
| 2009 | 3 | 1 |
| 2010 | 2 | 5 |
| 2011 | 0 | 3 |
| 2012 | 0 | 2 |
| 2013 | 4 | 3 |
| 2014 | 3 | 3 |
| 2015 | 2 | 3 |
| 2016 | 5 | 6 |
| 2017 | 1 | 1 |
| 2018 | 2 | 5 |
| 2019 | 5 | 5 |
| 2020 | 3 | 2 |
| 2021 | 3 | 3 |
| 2022 | 2 | 5 |
| 2023 | 5 | 2 |
| 2024 | 3 | 1 |
| 2025 | 2 | 0 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Spiral forming19 May 2026US 12,629,738 B2Keystone Tower Systems, Inc.
- Control system and method for tapered structure construction25 Mar 2025US 12,257,616 B2Keystone Tower Systems, Inc.
- Tapered structure construction18 Feb 2025US 12,226,813 B2Keystone Tower Systems, Inc.
- Duct cutting-and-forming device for elbow duct manufacturing device26 Nov 2024US 12,151,272 B2
- Method for producing a carcass, a method of producing a flexible pipe and a flexible pipe18 Jun 2024US 12,011,750 B2National Oilwell Varco Denmark I/S
- Bending machine27 Aug 2026US 2026/0249340 A1Odfjell Oceanwind AS
- Method of manufacture of a reinforced pipe15 Jan 2026US 2026/0014611 A1Odfjell Oceanwind AS
- Spiral forming14 Mar 2024US 2024/0082899 A1Keystone Tower Systems, Inc.
- A method for producing a carcass, a method of producing a flexible pipe and a flexible pipe31 Aug 2023US 2023/0271241 A1National Oilwell Varco Denmark I/S
- Tapered structure construction10 Aug 2023US 2023/0249236 A1Keystone Tower Systems, Inc.
Most cited
By later US patents
- Helical pipe lock seam45US 4,029,129 A1977
- Flexible corrugated tube45US 4,141,385 A1979
- Flexible piping method and apparatus of producing same44US 4,197,728 A1980
- Flexible cylindrical metal tube43US 3,938,558 AManufacturers Systems, Inc. · 1976
- Multi-wire electric power cable, particularly a supply cable for borehole units41US 4,749,823 AKabelmetal Electro GmbH · 1988