B21L 3/02
Machines or devices for welding chain links
B21L3/02 (Machines or devices for welding chain links) appears on 16 US grants and 4 published applications in this corpus.
Search patents in B21L- Granted patents
- 16
- Published applications
- 4
- Assignees
- 10
- Inventors
- 19
- Latest grant
- 24 Dec 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 4 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 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 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 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 | 1 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 2 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for producing gourmette jewellery articles24 Dec 2024US 12,172,205 B2Marco Bicego S.P.A.
- Stud link chain28 Nov 1995US 5,469,697 AKuroki Chain Mfg., Co., Ltd.
- Controlled pressure butt welding process and apparatus for carrying it out25 Sep 1990US 4,959,519 AMeyer, Roth & Pastor Maschinenfabrik GmbH
- Electrical chain welding machine17 Sep 1985US 4,542,275 A
- Welding method and apparatus suitable for forming links in jewelry5 Jun 1984US 4,453,072 ACreative Fastening Methods, Inc.
- Chain link and method for producing a chain link1 Jan 2026US 2026/0002578 A1Thiele GmbH & Co.KG
- Method and Apparatus for Chain Welding24 Oct 2024US 2024/0351095 A1
- Method for producing gourmette jewellery articles12 Sep 2024US 2024/0300006 A1Marco Bicego S.P.A.
- Method and equipment for making jewelry products, in particular tennis-type bracelets11 Nov 2021US 2021/0345738 A1
Most cited
By later US patents
- Method and apparatus for the successive welding of consecutive chain links8US 4,012,618 AMeyer, Roth & Pastor Maschinenfabrik GmbH · 1977
- Butt welding apparatus7US 4,075,451 AMeyer, Roth & Pastor Maschinenfabrik GmbH · 1978
- Welding method and apparatus suitable for forming links in jewelry7US 4,453,072 ACreative Fastening Methods, Inc. · 1984
- Stud link chain6US 5,469,697 AKuroki Chain Mfg., Co., Ltd. · 1995
- Method of and apparatus for producing particularly high-strength chains4US 3,934,407 AWafios, Maschinenfabrik, Wagner, Ficker & Schmid (GmbH & Co. KG) · 1976