Electrical steel strip friction stir welding method, method of producing electrical steel strip, friction stir welding device, and electrical steel strip production device
US-2026008118-A1 · Jan 8, 2026 · US
involving metallurgical change
involving metallurgical change · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B23K20/1275 |
| Official title | {involving metallurgical change} |
| Display label | involving metallurgical change |
| Total patents | 52 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 5 |
| 2017 | 8 |
| 2018 | 5 |
| 2019 | 8 |
| 2020 | 2 |
| 2021 | 6 |
| 2022 | 2 |
| 2023 | 1 |
| 2024 | 2 |
| 2025 | 6 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Corrosion and wear resistant overlay, method for forming corrosion and wear resistant overlay, and corrosion and wear resistant valve
US-12502727-B2 · Dec 23, 2025 · US
Friction stir spot welded joint and production method therefor, and friction stir spot welding method
US-12434327-B2 · Oct 7, 2025 · US
Shape processes, feedstock materials, conductive materials and/or assemblies
US-12403516-B2 · Sep 2, 2025 · US
Method for forming a metal matrix composite structure
US-12358071-B2 · Jul 15, 2025 · US
Electrical steel strip friction stir welding method and method of producing electrical steel strip
US-12337408-B2 · Jun 24, 2025 · US
Friction stir spot welded joint and production method therefor, and friction stir spot welding method
US-2025065438-A1 · Feb 27, 2025 · US
Electrical steel strip friction stir welding method and method of producing electrical steel strip
US-2024424598-A1 · Dec 26, 2024 · US
Method for forming a metal matrix composite structure
US-2024181559-A1 · Jun 6, 2024 · US
Friction stir processing for corrosion resistance
US-2023250524-A1 · Aug 10, 2023 · US
Vibration-damped aluminum article and method of forming the article
US-11413701-B1 · Aug 16, 2022 · US
Surface-modifying method for steel material and steel structure
US-2022162723-A1 · May 26, 2022 · US
Friction stir spot welding device and friction stir spot welding method
US-11185944-B2 · Nov 30, 2021 · US
Corrosion and Wear Resistant Overlay, Method for Forming Corrosion and Wear Resistant Overlay, and Corrosion and Wear Resistant Valve
US-2021323085-A1 · Oct 21, 2021 · US
Friction stir spot welding method and friction stir spot welding device
US-11135674-B2 · Oct 5, 2021 · US
Shape processes, feedstock materials, conductive materials and/or assemblies
US-2021197241-A1 · Jul 1, 2021 · US
Continuous feed method for friction stir processing
US-10987754-B1 · Apr 27, 2021 · US
Plastic working method for magnesium alloy
US-10898936-B2 · Jan 26, 2021 · US
Joined component and method of manufacturing same
US-2020290150-A1 · Sep 17, 2020 · US
Surface modification method for light metal casting
US-2020002795-A1 · Jan 2, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B23K20/1275?
- CPC B23K20/1275 is the Cooperative Patent Classification code for “involving metallurgical change.”
- How many patents are filed under CPC B23K20/1275 (involving metallurgical change)?
- Our database includes 52 publications tagged with this CPC code.
- Is patent activity under CPC B23K20/1275 growing?
- Publication counts under this code: 2 in 2024 vs 6 in 2025 (latest complete years).