B21F 11/005
Springs
Official title: {springs}
B21F11/005 (Springs) appears on 38 US grants and 25 published applications in this corpus.
Search patents in B21F- Granted patents
- 38
- Published applications
- 25
- Assignees
- 33
- Inventors
- 63
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 2 |
| 2005 | 1 | 2 |
| 2006 | 2 | 1 |
| 2007 | 1 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 1 | 1 |
| 2017 | 0 | 1 |
| 2018 | 1 | 1 |
| 2019 | 0 | 1 |
| 2020 | 1 | 3 |
| 2021 | 1 | 3 |
| 2022 | 1 | 1 |
| 2023 | 1 | 0 |
| 2024 | 2 | 1 |
| 2025 | 0 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Coiling machine, method for manufacturing coil spring, and coil spring21 Jul 2026US 12,686,082 B2NHK Spring Co., Ltd.
- Wire shaping apparatus and method of shaping a wire30 Apr 2024US 11,969,780 B2Hs Products Ltd
- Coiling machine, method for manufacturing coil spring, and coil spring23 Apr 2024US 11,964,321 B2NHK Spring Co., Ltd.
- Spring forming machine19 Sep 2023US 11,759,843 B2Asahi-Seiki Manufacturing Co., Ltd.
- Methods for manufacturing a spring, a spring brake, and a spring brake comprising a spring5 Apr 2022US 11,292,048 B2Somfy Activites SA
- Coiling machine and coil spring manufacturing method5 Jun 2025US 2025/0178068 A1NHK Spring Co., Ltd.
- Coiling machine and production method for coil springs5 Jun 2025US 2025/0178069 A1NHK Spring Co., Ltd.
- Coil spring product with rotary cutter7 Nov 2024US 2024/0367215 A1Spuhl AG
- Spring forming machine6 Oct 2022US 2022/0314301 A1Asahi-Seiki Manufacturing Co., Ltd.
- Coiling machine, method for manufacturing coil spring, and coil spring25 Nov 2021US 2021/0362274 A1NHK Spring Co., Ltd.
Most cited
By later US patents
- Machine for manufacturing wire coils18US 3,972,214 ABleckmann GmbH & Co. KG · 1976
- Method and construction for spiral wire binding of pads13US 4,129,156 ARicoh Company, Ltd. · 1978
- Spring interior forming and assembling apparatus12US 5,139,054 ALeggett & Platt, Incorporated · 1992
- Spring manufacturing apparatus and manufacturing method of the same12US 5,887,471 AKabushiki Kaisha Itaya Seisaku Sho · 1999
- Cutting method to be applied to producing helical springs by cold-forming thick high-strength wire9US 4,705,580 ANeturen Co., Ltd. · 1987