B21F 35/003
Multi-filament springs
Official title: {Multi-filament springs, e.g. made of stranded, braided, cable or multi-filament material}
B21F35/003 (Multi-filament springs) appears on 24 US grants and 12 published applications in this corpus.
Search patents in B21F- Granted patents
- 24
- Published applications
- 12
- Assignees
- 13
- Inventors
- 26
- Latest grant
- 30 Apr 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 1 | 2 |
| 2005 | 1 | 1 |
| 2006 | 1 | 0 |
| 2007 | 1 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 2 |
| 2020 | 0 | 2 |
| 2021 | 3 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Wire shaping apparatus and method of shaping a wire30 Apr 2024US 11,969,780 B2Hs Products Ltd
- System for manufacturing string of pocketed coil springs2 Nov 2021US 11,160,388 B2Ümit Elektronik Makina Sanayi Ve Ticaret A.S.
- System for manufacturing string of pocketed coil springs26 Oct 2021US 11,154,141 B2Ümit Elektronik Makina Sanayi Ve Ticaret A.S.
- Electrical dust filter manufacturing method and electrical dust filter manufactured thereby10 Aug 2021US 11,084,078 B2Nit Korea Co., Ltd
- System for manufacturing string of coiled pocketed springs10 Dec 2019US 10,499,746 B2
- System for manufacturing string of pocketed coil springs11 Jun 2020US 2020/0178699 A1Ümit Elektronik Makina Sanayi Ve Ticaret A.S.
- System for manufacturing string of pocketed coil springs11 Jun 2020US 2020/0178700 A1Ümit Elektronik Makina Sanayi Ve Ticaret A.S.
- Wire shaping apparatus and method of shaping a wire6 Jun 2019US 2019/0168287 A1Hs Products Ltd
- Electrical dust filter manufacturing method and electrical dust filter manufactured thereby7 Feb 2019US 2019/0039077 A1Nit Korea Co., Ltd
- Multi-head spring coilers and methods of using same21 Dec 2017US 2017/0360213 A1Ümit Elektronik Makina Sanayi Ve Ticaret A.S.
Most cited
By later US patents
- Fiber-reinforced resin coil spring and method of manufacturing the same50US 4,473,217 AKato Hatsujo Kaisha, Ltd. · 1984
- Multi-stranded coil spring30US 7,168,117 B2Dreamwell, Ltd. · 2007
- Multiple-strand torsion spring25US 4,889,327 APerfection Spring & Stamping Corp. · 1989
- Multiple torsion spring and methods of use24US 6,220,586 B1Precision Products Group · 2001
- Apparatus for producing a continuous flexible tubular conduit22US 4,135,869 ADayco Corporation · 1979