B21D 9/04
The mandrel being rigid
Official title: the mandrel being rigid
B21D9/04 (The mandrel being rigid) appears on 30 US grants and 33 published applications in this corpus.
Search patents in B21D- Granted patents
- 30
- Published applications
- 33
- Assignees
- 30
- Inventors
- 83
- Latest grant
- 9 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 1 | 1 |
| 2017 | 0 | 4 |
| 2018 | 2 | 1 |
| 2019 | 4 | 3 |
| 2020 | 1 | 7 |
| 2021 | 6 | 2 |
| 2022 | 4 | 3 |
| 2023 | 1 | 2 |
| 2024 | 1 | 2 |
| 2025 | 5 | 4 |
By publication year. Applications have been published since 2001.
Recent patents
- Bender9 Dec 2025US 12,491,552 B2
- Bending mandril comprising ultra high molecular weight material, related bending machines, systems, and methods25 Nov 2025US 12,479,019 B2Manufacturing Resources International, Inc.
- Helically wound tubular structures22 Jul 2025US 12,366,310 B2Techreo LLC
- Bending mandril comprising ultra high molecular weight material, related bending machines, systems, and methods8 Jul 2025US 12,350,730 B1Manufacturing Resources International, Inc.
- Fast change fold-a-way cross bow swing arm multiple die tubing bender4 Feb 2025US 12,214,411 B2Ritchie Engineering Company, Inc.
- Bending mandril comprising ultra high molecular weight material, related bending machines, systems, and methods2 Oct 2025US 2025/0303457 A1Manufacturing Resources International, Inc.
- Method and apparatus for expanding tube blanks31 Jul 2025US 2025/0242401 A1Hoffmann Neopac AG
- Bending mandril comprising ultra high molecular weight material, related bending machines, systems, and methods3 Jul 2025US 2025/0214128 A1Manufacturing Resources International, Inc.
- Fast change fold-a-way cross bow swing arm multiple die tubing bender29 May 2025US 2025/0170632 A1Ritchie Engineering Company, Inc.
- Bender23 May 2024US 2024/0165687 A1
Most cited
By later US patents
- Vented bending sleeves for coaxial tubing systems60US 5,497,809 A1996
- Method of making pre-formed tubular members4US 7,143,618 B2General Motors Corporation · 2006
- Copper pipe bending tool2US 10,052,672 B12018
- Production of tubular members2US 4,489,585 ABritish Steel Corporation · 1984
- Bending method for pipe material2US 6,347,539 B1Sango Co., Ltd. · 2002