B21F 27/121
Of tubular form
Official title: {of tubular form, e.g. as reinforcements for pipes or pillars}
B21F27/121 (Of tubular form) appears on 83 US grants and 57 published applications in this corpus.
Search patents in B21F- Granted patents
- 83
- Published applications
- 57
- Assignees
- 59
- Inventors
- 135
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 4 |
| 2003 | 2 | 2 |
| 2004 | 0 | 4 |
| 2005 | 5 | 3 |
| 2006 | 2 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 3 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 2 |
| 2013 | 2 | 3 |
| 2014 | 0 | 2 |
| 2015 | 3 | 2 |
| 2016 | 1 | 4 |
| 2017 | 2 | 2 |
| 2018 | 3 | 3 |
| 2019 | 1 | 5 |
| 2020 | 4 | 3 |
| 2021 | 0 | 2 |
| 2022 | 3 | 4 |
| 2023 | 4 | 4 |
| 2024 | 3 | 3 |
| 2025 | 1 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Apparatus for loading a cage welding machine and cage welding machine10 Feb 2026US 12,544,827 B2MBK Maschinenbau GmbH
- Methods of additively manufacturing tower structures with coiled polymer reinforcement members3 Jun 2025US 12,319,001 B2GE Vernova Infrastructure Technology LLC
- Sheath formed by at least one circular knit for producing a reinforced concrete pile10 Dec 2024US 12,163,306 B2C.H.A.B
- Apparatus for loading a cage welding machine and cage welding machine19 Mar 2024US 11,931,794 B2MBK Maschinenbau GmbH
- Device for producing a metal mesh reinforcement13 Feb 2024US 11,897,023 B2MBK Maschinenbau GmbH
- Reinforcement cage for end member of shear wall, jig for making reinforcement cage and method for making reinforcement cage29 Aug 2024US 2024/0287802 A1Ruentex Engineering & Construction Co., Ltd.
- Apparatus for loading a cage welding machine and cage welding machine13 Jun 2024US 2024/0189885 A1MBK Maschinenbau GmbH
- Methods of additively manufacturing tower structures with coiled polymer reinforcement members16 May 2024US 2024/0157644 A1General Electric Company
- Reinforcement Cage Rolling Machine28 Sep 2023US 2023/0302526 A1China Mcc5 Group Corp. Ltd
- Apparatus for producing a metal grid reinforcement and machine23 Mar 2023US 2023/0086409 A1MBK Maschinenbau GmbH
Most cited
By later US patents
- Modular reinforcement cages for ductile concrete frame members and method of fabricating and erecting the same44US 5,392,580 A1995
- Method of manufacturing a reinforcing bar cage and apparatus for manufacturing the same21US 5,665,254 ADaiichi Unyusagyo Co. Ltd. · 1997
- Method and apparatus for making well screen16US 4,314,129 AHouston Well Screen Company · 1982
- Modular steel concrete reinforcement system14US 6,627,832 B2Global Steel, LLC · 2003
- Method for manufacturing a stent having superior bending characteristics, and stent manufactured thereby13US 9,320,624 B2Taewoong Medical Co., Ltd. · 2016