B21F 3/10
To spirals other than flat
Official title: to spirals other than flat, e.g. conical
B21F3/10 (To spirals other than flat) appears on 25 US grants and 17 published applications in this corpus.
Search patents in B21F- Granted patents
- 25
- Published applications
- 17
- Assignees
- 19
- Inventors
- 47
- Latest grant
- 10 Nov 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 2 |
| 2004 | 0 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 1 |
| 2014 | 2 | 2 |
| 2015 | 0 | 2 |
| 2016 | 0 | 0 |
| 2017 | 0 | 2 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 2 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Device and method for forming end of coiled spring10 Nov 2020US 10,828,690 B2Mitsubishi Steel Mfg. Co., Ltd.
- Soil auger and method of manufacture17 Mar 2020US 10,589,332 B2Sentek Pty Ltd
- Coil winding method and winding apparatus17 Sep 2019US 10,418,173 B2SHT Corporation Limited
- Device and method for forming end of coiled spring23 Dec 2014US 8,915,112 B2Mitsubishi Steel Mfg. Co., Ltd.
- Apparatus and method for forming wire9 Sep 2014US 8,826,945 B1
- Method of Automating Coil Height Control in a Wire Rod Plant24 Nov 2022US 2022/0371077 A1Primetals Technologies USA LLC
- Soil auger and method of manufacture4 May 2017US 2017/0120315 A1Sentek Pty Ltd
- Coil winding method and winding apparatus9 Mar 2017US 2017/0069424 A1SHT Corporation Limited
- System for adjusting load characteristics of conical spring20 Aug 2015US 2015/0231687 A1Orii & Mec Corporation
- Device and method for forming end of coiled spring16 Apr 2015US 2015/0101699 A1Mitsubishi Steel Mfg. Co., Ltd.
Most cited
By later US patents
- Arrangement for fabricating double conical springs16US 4,424,695 AEstel Hoesch Werke Aktiengesellschaft · 1984
- Method of forming a coil spring14US 4,444,036 ANHK Spring Co., Ltd. · 1984
- Inductor winding with conductive ribbon13US 5,770,991 ATexas Instruments Incorporated · 1998
- Method and apparatus for forming a pig tail end on a coil spring11US 4,571,973 AMorita Iron Works Co., Ltd. · 1986
- Inductor winding apparatus and method11US 5,321,965 ATexas Instruments Incorporated · 1994