B21F 35/00
Making springs from wire
B21F35/00 (Making springs from wire) appears on 221 US grants and 181 published applications in this corpus.
Search patents in B21F- Granted patents
- 221
- Published applications
- 181
- Assignees
- 129
- Inventors
- 368
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 0 | 0 |
| 1978 | 4 | 0 |
| 1979 | 4 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 5 | 0 |
| 1987 | 6 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 6 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 9 | 0 |
| 1999 | 5 | 0 |
| 2000 | 5 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 4 |
| 2003 | 4 | 4 |
| 2004 | 4 | 6 |
| 2005 | 2 | 7 |
| 2006 | 9 | 4 |
| 2007 | 2 | 3 |
| 2008 | 3 | 11 |
| 2009 | 0 | 5 |
| 2010 | 3 | 5 |
| 2011 | 4 | 12 |
| 2012 | 10 | 10 |
| 2013 | 9 | 13 |
| 2014 | 12 | 9 |
| 2015 | 5 | 9 |
| 2016 | 6 | 8 |
| 2017 | 14 | 14 |
| 2018 | 3 | 12 |
| 2019 | 10 | 9 |
| 2020 | 7 | 9 |
| 2021 | 10 | 8 |
| 2022 | 5 | 2 |
| 2023 | 4 | 2 |
| 2024 | 4 | 4 |
| 2025 | 1 | 6 |
| 2026 | 1 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Tool moving device and wire forming machine22 Sep 2026US 12,741,310 B2Asahi-Seiki Manufacturing Co., Ltd.
- Method and system of producing coil springs18 Mar 2025US 12,252,356 B2WAFIOS Aktiengesellschaft
- Method for determining propelling condition for shot medium, and method for manufacturing coil spring24 Sep 2024US 12,097,591 B2Hitachi Astemo, 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.
- Wire data processing system, control device, control method, and control program8 Oct 2026US 2026/0309483 A1NHK Spring Co., Ltd.
- Intelligent Manufacturing Device for Constant Force Springs6 Aug 2026US 2026/0225149 A1Guangzhou Auto Spring Co., Ltd.
- Tool moving device and wire forming machine11 Jun 2026US 2026/0158540 A1Asahi-Seiki Manufacturing Co., Ltd.
- Coil spring manufacturing method12 Feb 2026US 2026/0042138 A1NHK Spring Co., Ltd.
- Coil spring and manufacturing method of the same16 Oct 2025US 2025/0320902 A1NHK Spring Co., Ltd.
Most cited
By later US patents
- Guide wire for medical purpose and manufacturing process of coil thereof142US 5,520,194 AAsahi Intecc Co., Ltd. · 1996
- Printed springs and method of manufacture137US 5,743,428 AVulcan Spring & Mfg. Co. · 1998
- Process of manufacturing an aneurysm clip100US 5,758,420 AFlorida Hospital Supplies, Inc. · 1998
- Fiber-reinforced resin coil spring and method of manufacturing the same50US 4,473,217 AKato Hatsujo Kaisha, Ltd. · 1984
- Spring and spring processing method43US 8,069,881 B1Barnes Group Inc. · 2011