Welding apparatus and method
US-12491573-B2 · Dec 9, 2025 · US
Narrow gap welding
Narrow gap welding · 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 | B23K9/0213 |
| Official title | {Narrow gap welding} |
| Display label | Narrow gap welding |
| Total patents | 56 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 10 |
| 2017 | 3 |
| 2018 | 5 |
| 2019 | 10 |
| 2020 | 3 |
| 2021 | 7 |
| 2022 | 3 |
| 2023 | 5 |
| 2024 | 3 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
High-heat-input combined welding method for thick-walled high-strength steel
US-12440927-B1 · Oct 14, 2025 · US
Rapid electro-gas welding method with swing arc, and welding torch therewith and application thereof
US-2025187097-A1 · Jun 12, 2025 · US
Gas-shielded arc welding method, welded joint, and method for producing welded joint
US-2024307990-A1 · Sep 19, 2024 · US
Joining metal or alloy components using electric current
US-12011763-B2 · Jun 18, 2024 · US
Welding torch with wire electrode guide
US-2024181553-A1 · Jun 6, 2024 · US
Electrode assembly for arc welding
US-2023158598-A1 · May 25, 2023 · US
Electrode assembly for arc welding
US-2023158596-A1 · May 25, 2023 · US
Electrode assembly for arc welding
US-2023158597-A1 · May 25, 2023 · US
Swing/rotating gas metal arc welding torch and use method therefor
US-11583949-B2 · Feb 21, 2023 · US
GTAW system and welding method for thick plates with an ultra-narrow gap
US-11571763-B2 · Feb 7, 2023 · US
Swing/rotating gas metal arc welding torch and use method therefor
US-2022388088-A1 · Dec 8, 2022 · US
Welding apparatus and method
US-2022266369-A1 · Aug 25, 2022 · US
Joining metal or alloy components using electric current
US-2022055104-A1 · Feb 24, 2022 · US
Joining metal or alloy components using electric current
US-11179776-B2 · Nov 23, 2021 · US
High-productivity hybrid induction heating/welding assembly
US-11172549-B2 · Nov 9, 2021 · US
Joining metal or alloy components using electric current
US-11167348-B2 · Nov 9, 2021 · US
Method of making a steel Yankee cylinder
US-11103947-B2 · Aug 31, 2021 · US
Rotor shaft and method for producing a rotor shaft
US-11066933-B2 · Jul 20, 2021 · US
Narrow groove welding method and system
US-10953484-B2 · Mar 23, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B23K9/0213?
- CPC B23K9/0213 is the Cooperative Patent Classification code for “Narrow gap welding.”
- How many patents are filed under CPC B23K9/0213 (Narrow gap welding)?
- Our database includes 56 publications tagged with this CPC code.
- Is patent activity under CPC B23K9/0213 growing?
- Publication counts under this code: 3 in 2024 vs 3 in 2025 (latest complete years).