B23K 20/227
With ferrous layer
Official title: with ferrous layer
B23K20/227 (With ferrous layer) appears on 308 US grants and 383 published applications in this corpus.
Search patents in B23K- Granted patents
- 308
- Published applications
- 383
- Assignees
- 252
- Inventors
- 870
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 6 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 4 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 5 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 5 | 2 |
| 2002 | 3 | 4 |
| 2003 | 4 | 3 |
| 2004 | 2 | 11 |
| 2005 | 3 | 9 |
| 2006 | 5 | 8 |
| 2007 | 1 | 7 |
| 2008 | 3 | 6 |
| 2009 | 2 | 4 |
| 2010 | 4 | 8 |
| 2011 | 6 | 12 |
| 2012 | 6 | 12 |
| 2013 | 4 | 8 |
| 2014 | 6 | 7 |
| 2015 | 10 | 25 |
| 2016 | 11 | 41 |
| 2017 | 16 | 27 |
| 2018 | 26 | 28 |
| 2019 | 11 | 30 |
| 2020 | 29 | 17 |
| 2021 | 16 | 28 |
| 2022 | 19 | 23 |
| 2023 | 17 | 28 |
| 2024 | 23 | 21 |
| 2025 | 20 | 9 |
| 2026 | 9 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for joining metal materials and controlling bonding quality thereof25 Aug 2026US 12,715,061 B2Toyama Prefecture
- Method for producing a welded metal blank and thus obtained welded metal blank16 Jun 2026US 12,654,250 B2ArcelorMittal
- Carbon steel and austenitic stainless steel rolling clad plate manufacturing method therefor19 May 2026US 12,629,766 B2Baoshan Iron & Steel Co., Ltd.
- Electrical steel strip, use of an electrical steel strip and method for producing an electrical steel strip19 May 2026US 12,633,442 B2Wickeder Westfalenstahl GmbH
- Friction stir spot welded joint and production method therefor, and friction stir spot welding method14 Apr 2026US 12,599,987 B2Jfe Steel Corporation
- Small-scale solid-state additive manufacturing tools and designs30 Jul 2026US 2026/0216817 A1Virginia Tech Intellectual Properties, Inc.
- Components and the manufacture thereof via welding with reduced alloy-depletion16 Jul 2026US 2026/0199974 A1
- Friction element welding method16 Jul 2026US 2026/0200006 A1Jfe Steel Corporation
- Friction element welding method16 Jul 2026US 2026/0200007 A1Jfe Steel Corporation
- Method for preparing alloy for diffusion bonding, and diffusion bonding material produced using method for preparing alloy for diffusion bonding2 Apr 2026US 2026/0091446 A1Korea Atomic Energy Research Institute
Most cited
By later US patents
- Method for joining parts of Ni-Ti alloys with different metals140US 5,368,661 AFurukawa Electric Co., Ltd. · 1994
- Joined parts of Ni-Ti alloys with different metals and joining method therefor107US 5,358,796 AFurukawa Electric Co., Ltd. · 1994
- Process for fabricating multi-alloy components80US 4,529,452 AUnited Technologies Corporation · 1985
- Friction stir welding using a superabrasive tool79US 6,648,206 B22003
- Diffusion bonding method for corrosion-resistant materials69US 5,118,028 ASumitomo Metal Industries, Ltd. · 1992