B21K 7/00
Making railway appurtenances
Official title: Making railway appurtenances; Making vehicle parts
B21K7/00 (Making railway appurtenances) appears on 31 US grants and 40 published applications in this corpus.
Search patents in B21K- Granted patents
- 31
- Published applications
- 40
- Assignees
- 40
- Inventors
- 98
- Latest grant
- 10 Sep 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 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 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 2 |
| 2014 | 1 | 0 |
| 2015 | 1 | 15 |
| 2016 | 3 | 0 |
| 2017 | 6 | 4 |
| 2018 | 3 | 4 |
| 2019 | 3 | 1 |
| 2020 | 3 | 3 |
| 2021 | 0 | 2 |
| 2022 | 3 | 0 |
| 2023 | 1 | 3 |
| 2024 | 3 | 2 |
| 2025 | 0 | 2 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Method for forming hitch ball head10 Sep 2024US 12,083,583 B2Chuen Chao Enterprises Co., Ltd.
- Method for manufacturing a monolithic aircraft door by die-cutting and machining11 Jun 2024US 12,006,065 B2Aubert & Duval
- Component with structured panel(s) and methods for forming the component12 Mar 2024US 11,925,971 B2Rohr, Inc.
- Stabilizer and method of manufacturing same28 Nov 2023US 11,827,068 B2NHK Spring Co., Ltd.
- Switch device18 Oct 2022US 11,473,247 B2Voestalpine Bwg GmbH & Co. KG
- Method of manufacturing stabilizer and base material26 Jun 2025US 2025/0205773 A1NHK Spring Co., Ltd.
- Method for manufacturing a monolithic component13 Mar 2025US 2025/0083835 A1
- Bicycle seat rail manufacturing method12 Dec 2024US 2024/0410042 A1
- Method for forming hitch ball head23 May 2024US 2024/0165694 A1Chuen Chao Enterprises Co., Ltd.
- Method for manufacturing a monolithic aircraft door by die-cutting and machining3 Aug 2023US 2023/0242276 A1Aubert & Duval
Most cited
By later US patents
- Lightweight steel door for vehicle and method for manufacturing the same11US 8,910,999 B2Arcelormittal Investigacion Y Desarrollo, S.L. · 2014
- Process for modifying the section of a railway rail and rail thus obtained7US 5,611,234 AKihn · 1997
- Method of making a resilient double C-shaped clip for securing a rail on a support and a clip made by the use of this method5US 4,025,044 AB.V. Schroefboutenfabriek v.h.Everts en van der Weijden · 1977
- Press component and method and device for manufacturing same5US 9,718,499 B2Nippon Steel & Sumitomo Metal Corporation · 2017
- Force transmission device3US 9,568,060 B2Meritor Heavy Vehicle Braking Systems (UK) Limited · 2017