B21L 1/00
Making chains or chain links by bending workpieces of rod, wire, or
Official title: Making chains or chain links by bending workpieces of rod, wire, or strip to form links of oval or other simple shape (B21L3/00, B21L7/00 take precedence)
B21L1/00 (Making chains or chain links by bending workpieces of rod, wire, or) appears on 22 US grants and 14 published applications in this corpus.
Search patents in B21L- Granted patents
- 22
- Published applications
- 14
- Assignees
- 13
- Inventors
- 26
- Latest grant
- 29 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 2 | 1 |
| 2004 | 1 | 4 |
| 2005 | 3 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 2 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
| 2023 | 2 | 1 |
| 2024 | 0 | 1 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Wedge driver and method therefor29 Apr 2025US 12,285,796 B2BNSF Railway Company
- Wedge driver and method therefor26 Dec 2023US 11,850,656 B2BNSF Railway Company
- Wedge driver and method therefor21 Mar 2023US 11,607,720 B2BNSF Railway Company
- Method of forming jewelry articles26 Sep 2006US 7,111,447 B2
- Lightweight OMEGA chain and improved method of manufacture29 Nov 2005US 6,968,671 B2Aurafin Corporation
- Chain link and method for producing a chain link1 Jan 2026US 2026/0002578 A1Thiele GmbH & Co.KG
- Wedge driver and method therefor14 Aug 2025US 2025/0256325 A1BNSF Railway Company
- Wedge driver and method therefor18 Apr 2024US 2024/0123491 A1BNSF Railway Company
- Wedge driver and method therefor13 Apr 2023US 2023/0110959 A1BNSF Railway Company
- Wedge driver and method therefor29 Sep 2022US 2022/0305547 A1BNSF Railway Company
Most cited
By later US patents
- Lightweight omega chain and improved method of manufacture25US 6,860,097 B22005
- Method for bending chain links and chain link bending machine11US 4,123,899 AMeyer, Roth & Pastor Maschinenfabrik GmbH · 1978
- Method and apparatus for the manufacture of chains with round links, having varying mechanical characteristics6US 3,961,474 AMeyer, Roth & Pastor Maschinenfabrik GmbH · 1976
- Machine for the formation of chains with links of two types6US 4,311,003 AEmmegizeta Metalmeccanica Gori & Zucchi M.G.Z. S.p.A. · 1982
- Prickle chain device and method of production thereof6US 4,893,463 A1990