B21F 3/027
With extended ends formed in a special shape
Official title: with extended ends formed in a special shape, e.g. for clothes-pegs
B21F3/027 (With extended ends formed in a special shape) appears on 29 US grants and 6 published applications in this corpus.
Search patents in B21F- Granted patents
- 29
- Published applications
- 6
- Assignees
- 18
- Inventors
- 41
- Latest grant
- 29 Aug 2017
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 3 | 2 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 2 |
| 2016 | 0 | 0 |
| 2017 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Hot formed coiling machine29 Aug 2017US 9,744,584 B2Dae Won Kang Up Co., Ltd.
- Bending device and spring manufacturing machine20 Jun 2017US 9,682,417 B2Shinko Machinery Co., Ltd.
- Wire spring forming apparatus11 Apr 2006US 7,024,901 B2Orii & Mec Corporation
- Mold head device of spring forming machine16 Nov 2004US 6,817,220 B2Shin Chuau HWA Co., Ltd.
- Conveyance system for interface with component production and assembly equipment10 Feb 2004US 6,688,457 B2Sealy Technoly LLC
- Hot formed coiling machine1 Oct 2015US 2015/0273565 A1Dae Won Kang Up Co., Ltd.
- Bending Device and Spring Manufacturing Machine6 Aug 2015US 2015/0217361 A1Shinko Machinery Co., Ltd.
- Wire spring forming apparatus28 Oct 2004US 2004/0211236 A1Orii & Mec Corporation
- Mold head device of spring forming machine27 May 2004US 2004/0099031 A1Shin Chuau HWA Co., Ltd.
- Device for bending an extremity of a torsional spring26 Jun 2003US 2003/0115928 A1Canimex Inc.
Most cited
By later US patents
- Apparatus for shaping wire21US 5,363,681 AWafios Machinenfabrik GmbH & Co. · 1994
- Automatic spring formation apparatus18US 5,452,598 AMinyu Machinery Corp., Ltd. · 1995
- Spring manufacturing apparatus12US 5,839,312 AKabushiki Kaisha Itaya Seisaku Sho · 1998
- Coil and coil head formation dies for coils with non-conventional terminal convolutions12US 6,640,836 B1Sealy Technology, LLC · 2003
- Wire spring forming apparatus11US 7,024,901 B2Orii & Mec Corporation · 2006