Low-density clad steel sheet having excellent formability and fatigue property and manufacturing method therefor
US-2024326399-A1 · Oct 3, 2024 · US
with ferrous layer
with ferrous layer · 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 | B23K20/227 |
| Official title | with ferrous layer |
| Display label | with ferrous layer |
| Total patents | 292 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 16 |
| 2016 | 31 |
| 2017 | 28 |
| 2018 | 37 |
| 2019 | 24 |
| 2020 | 32 |
| 2021 | 26 |
| 2022 | 25 |
| 2023 | 26 |
| 2024 | 26 |
| 2025 | 16 |
| 2026 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Butt welding method and friction stir welding tool
US-9849541-B2 · Dec 26, 2017 · US
Method and apparatus to form a workpiece employing vibration welding
US-2017334016-A1 · Nov 23, 2017 · US
Friction stir welding method for structural steel and method of manufacturing joint for structural steel
US-9821407-B2 · Nov 21, 2017 · US
Multi-layer flat steel product and component produced therefrom
US-2017297304-A1 · Oct 19, 2017 · US
Joint unit, magnetic rotating arc joining method, and method of manufacturing joint unit
US-2017284570-A1 · Oct 5, 2017 · US
Lithium-ion secondary-battery case and manufacturing method therefor
US-2017271627-A1 · Sep 21, 2017 · US
Bearing component part and a method to form a bearing component
US-9694439-B2 · Jul 4, 2017 · US
Precisely aligned, friction welded spiral bevel or hypoid ring gear and differential case assembly
US-2017152930-A1 · Jun 1, 2017 · US
Rotary tool and joining method
US-2017151625-A1 · Jun 1, 2017 · US
Spin-welded electrical ground assemblies
US-2017141484-A1 · May 18, 2017 · US
Spin-welded electrical ground and spin welding methods
US-9601837-B2 · Mar 21, 2017 · US
Mechanical dimpling for vapor expression in welding
US-2017066076-A1 · Mar 9, 2017 · US
Screen bar, bar screen and method for producing a screen bar
US-2016368024-A1 · Dec 22, 2016 · US
Shanks and methods for forming such shanks
US-2016356305-A1 · Dec 8, 2016 · US
Modifying metal or alloy substrates
US-2016354861-A1 · Dec 8, 2016 · US
Friction stir weld tool and method
US-2016354860-A1 · Dec 8, 2016 · US
Methods of Manufacturing Corrosion Resistant Bimetal Parts and Bimetal Parts Formed Therefrom
US-2016339540-A1 · Nov 24, 2016 · US
Techniques for joining one or more structures of an electronic device
US-2016342179-A1 · Nov 24, 2016 · US
System for preventing the formation of martensite in metals joining applications
US-9498843-B2 · Nov 22, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B23K20/227?
- CPC B23K20/227 is the Cooperative Patent Classification code for “with ferrous layer.”
- How many patents are filed under CPC B23K20/227 (with ferrous layer)?
- Our database includes 292 publications tagged with this CPC code.
- Is patent activity under CPC B23K20/227 growing?
- Publication counts under this code: 26 in 2024 vs 16 in 2025 (latest complete years).