B21K 1/12
Of specially-shaped cross-section
Official title: of specially-shaped cross-section
B21K1/12 (Of specially-shaped cross-section) appears on 108 US grants and 110 published applications in this corpus.
Search patents in B21K- Granted patents
- 108
- Published applications
- 110
- Assignees
- 86
- Inventors
- 259
- Latest grant
- 23 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 5 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 5 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 3 |
| 2002 | 1 | 8 |
| 2003 | 4 | 5 |
| 2004 | 5 | 6 |
| 2005 | 3 | 7 |
| 2006 | 2 | 9 |
| 2007 | 8 | 5 |
| 2008 | 1 | 8 |
| 2009 | 3 | 7 |
| 2010 | 2 | 3 |
| 2011 | 3 | 3 |
| 2012 | 4 | 4 |
| 2013 | 6 | 4 |
| 2014 | 1 | 1 |
| 2015 | 3 | 5 |
| 2016 | 3 | 2 |
| 2017 | 1 | 1 |
| 2018 | 2 | 4 |
| 2019 | 1 | 5 |
| 2020 | 4 | 8 |
| 2021 | 2 | 5 |
| 2022 | 5 | 3 |
| 2023 | 7 | 1 |
| 2024 | 2 | 3 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Device and method for continuously producing an at least partly hollow shaft having a varying inner and/or outer diameter23 Dec 2025US 12,502,705 B2MAGNA Powertrain AG & Co KG
- Anchor for reinforcing bar made of fiber-reinforced plastic and manufacturing method therefor8 Apr 2025US 12,269,085 B2Nakagawa Sangyo Co., Ltd.
- Polygon prism torsion bar23 Apr 2024US 11,965,572 B2Steering Solutions IP Holding Corporation
- Hollow shaft member and rolling device16 Apr 2024US 11,959,516 B2Thk Co., Ltd.
- Torsion bar active length control and method of manufacturing21 Nov 2023US 11,819,962 B2Steering Solutions IP Holding Corporation
- Method for manufacturing constant velocity drive shaft26 Sep 2024US 2024/0316618 A1Sigma & Hearts Co., Ltd.
- Radial forging for the manufacture of ball screw actuator shafts12 Sep 2024US 2024/0300005 A1The Boeing Company
- Device and method for continuously producing an at least partly hollow shaft having a varying inner and/or outer diameter6 Jun 2024US 2024/0181515 A1MAGNA Powertrain AG & Co KG
- Anchor for reinforcing bar made of fiber-reinforced plastic and manufacturing method therefor5 Oct 2023US 2023/0311198 A1Nakagawa Sangyo Co., Ltd.
- Shaft assembly and method of producing the same24 Nov 2022US 2022/0371068 A1
Most cited
By later US patents
- Hydroforming of compound tubes93US 5,333,775 AGeneral Motors Corporation · 1994
- Flexible shaft and method for manufacturing same91US 5,488,761 A1996
- Method for forming a lightweight flanged axle shaft35US 5,213,250 A1993
- Method for producing a propeller shaft32US 5,771,737 AMatsui Universal Joint Manufacturing Company · 1998
- Process for forming light-weight tublar axles25US 5,522,246 AU.S. Manufacturing Corporation · 1996