B21F 37/04
Manufacture of rings from wire: of washers
Official title: of washers (B21F37/02 takes precedence)
B21F37/04 (Manufacture of rings from wire: of washers) appears on 5 US grants and 5 published applications in this corpus.
Search patents in B21F- Granted patents
- 5
- Published applications
- 5
- Assignees
- 6
- Inventors
- 14
- Latest grant
- 26 May 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 1 |
| 2019 | 1 | 0 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for producing a flat spiral spring, and bending device for producing same26 May 2020US 10,661,330 B2Adolf Schnorr GmbH + Co. KG
- Method of manufacturing washer and washer2 Jul 2019US 10,337,552 B2Taiho Kogyo Co., Ltd.
- Shaped composites and method of making thereof28 Jun 2011US 7,966,855 B2Saint-Gobain Ceramics & Plastics, Inc.
- Spring washer and method for making the same22 Sep 1998US 5,809,820 ANissan Screw Co., Ltd.
- Method of manufacturing a washer9 Nov 1993US 5,259,819 A
- Compacted steel strand with cladded core15 Feb 2024US 2024/0052565 A1NV Bekaert SA
- Washer and method for manufacturing the same25 May 2023US 2023/0158561 A1
- Method of manufacturing washer and washer21 Jun 2018US 2018/0172061 A1Taiho Kogyo Co., Ltd.
- Method for producing a flat spiral spring, and bending device for producing same3 Aug 2017US 2017/0216905 A1Adolf Schnorr GmbH + Co. KG
- Shaped composites and method of making thereof13 Sep 2007US 2007/0212198 A1Saint-Gobain Performance Plastics Corporation
Most cited
By later US patents