Apparatus and related methods for friction stir additive manufacturing repair of materials
US-2026084232-A1 · Mar 26, 2026 · US
Control circuits therefor
Control circuits therefor · 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 | B23K20/121 |
| Official title | {Control circuits therefor} |
| Display label | Control circuits therefor |
| Total patents | 54 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 1 |
| 2018 | 5 |
| 2019 | 8 |
| 2020 | 9 |
| 2021 | 9 |
| 2022 | 8 |
| 2023 | 6 |
| 2024 | 3 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Dissimilar material solid phase bonding method, and dissimilar material solid phase bonded structure
US-2025353103-A1 · Nov 20, 2025 · US
Friction stir welding attachment, friction stir welding head, and friction stir welding device
US-12325084-B2 · Jun 10, 2025 · US
Machine tool and control method of machine tool
US-12269111-B2 · Apr 8, 2025 · US
Method and apparatus for friction current joining
US-12103102-B2 · Oct 1, 2024 · US
Method for low-temperature joining of metal materials, and joint structure
US-11964338-B2 · Apr 23, 2024 · US
Friction stir welding attachment, friction stir welding head, and friction stir welding device
US-2024066622-A1 · Feb 29, 2024 · US
Joining method
US-11717915-B2 · Aug 8, 2023 · US
Machine tool
US-11707797-B2 · Jul 25, 2023 · US
Machine tool and control method of machine tool
US-2023182230-A1 · Jun 15, 2023 · US
Processing route to design and manufacture highly configurable non-magnetic down-hole sensor collars
US-11654506-B2 · May 23, 2023 · US
Processing route to design and manufacture highly configurable non-magnetic down-hole sensor collars
US-2023130962-A1 · Apr 27, 2023 · US
Joining method
US-11628514-B2 · Apr 18, 2023 · US
Linear friction-joining device and linear friction-joining method
US-11498154-B2 · Nov 15, 2022 · US
Adaptive friction element weld process and control
US-2022324051-A1 · Oct 13, 2022 · US
Machine tool
US-11465230-B2 · Oct 11, 2022 · US
Double-sided friction stir welding method for metal sheets and double-sided friction stir welding device
US-11446757-B2 · Sep 20, 2022 · US
Method and Apparatus for Friction Current Joining
US-2022212281-A1 · Jul 7, 2022 · US
System and method for measuring energy conversion efficiency of inertia friction welding machine
US-11325202-B2 · May 10, 2022 · US
Machine tool
US-2022126393-A1 · Apr 28, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B23K20/121?
- CPC B23K20/121 is the Cooperative Patent Classification code for “Control circuits therefor.”
- How many patents are filed under CPC B23K20/121 (Control circuits therefor)?
- Our database includes 54 publications tagged with this CPC code.
- Is patent activity under CPC B23K20/121 growing?
- Publication counts under this code: 3 in 2024 vs 3 in 2025 (latest complete years).