Method of jointing cables
US-2025323477-A1 · Oct 16, 2025 · US
Butt welding
Butt 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 | B23K20/028 |
| Official title | {Butt welding} |
| Display label | Butt welding |
| Total patents | 25 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 2 |
| 2017 | 6 |
| 2018 | 2 |
| 2019 | 3 |
| 2020 | 1 |
| 2021 | 1 |
| 2022 | 2 |
| 2023 | 3 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method utilizing cold welding to prepare grain boundaries having different included angles
US-11766736-B2 · Sep 26, 2023 · US
Metal material solid-phase bonding method and solid-phase bonding device
US-11745287-B2 · Sep 5, 2023 · US
Method utilizing cold welding to prepare grain boundaries having different included angles
US-2023039597-A1 · Feb 9, 2023 · US
Welding method of diffusion bonded structure
US-11498145-B2 · Nov 15, 2022 · US
Fitting member, annular member, joined member and method of manufacturing joined member
US-11484963-B2 · Nov 1, 2022 · US
Metal material solid-phase bonding method and solid-phase bonding device
US-2021107087-A1 · Apr 15, 2021 · US
Steel sheet, tailored blank, hot stamped product, steel pipe, hollow hot stamped product, method of manufacturing steel sheet, method of manufacturing tailored blank, method of manufacturing hot stamped product, method of manufacturing steel pipe, and method of manufacturing hollow hot stamped product
US-2020271247-A1 · Aug 27, 2020 · US
Welding method of diffusion bonded structure
US-2019337078-A1 · Nov 7, 2019 · US
Fitting member, annular member, joined member and method of manufacturing joined member
US-2019291166-A1 · Sep 26, 2019 · US
Dual alloy turbine rotors and methods for manufacturing the same
US-10399176-B2 · Sep 3, 2019 · US
Alternative materials for mandrel in infiltrated metal-matrix composite drill bits
US-10119339-B2 · Nov 6, 2018 · US
Friction welding
US-10046414-B2 · Aug 14, 2018 · US
Dual alloy turbine rotors and methods for manufacturing the same
US-2017304929-A1 · Oct 26, 2017 · US
Joint unit, magnetic rotating arc joining method, and method of manufacturing joint unit
US-2017284570-A1 · Oct 5, 2017 · US
Dual alloy turbine rotors and methods for manufacturing the same
US-9724780-B2 · Aug 8, 2017 · US
Frame rail for a vehicle
US-9637171-B2 · May 2, 2017 · US
Alternative materials for mandrel in infiltrated metal-matrix composite drill bits
US-2017107766-A1 · Apr 20, 2017 · US
Shear bonding device and shear bonding method of metal plates
US-9579747-B2 · Feb 28, 2017 · US
Friction welding
US-2016228979-A1 · Aug 11, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B23K20/028?
- CPC B23K20/028 is the Cooperative Patent Classification code for “Butt welding.”
- How many patents are filed under CPC B23K20/028 (Butt welding)?
- Our database includes 25 publications tagged with this CPC code.
- Is patent activity under CPC B23K20/028 growing?
- Publication counts under this code: 3 in 2023 vs 1 in 2025 (latest complete years).