Method of manufacturing stacked core and apparatus for manufacturing stacked core
US-11469652-B2 · Oct 11, 2022 · US
Perforating, i.e. punching holes
Perforating, i.e. punching holes · 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 | B21D28/24 |
| Official title | Perforating, i.e. punching holes |
| Display label | Perforating, i.e. punching holes |
| Total patents | 76 |
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 | 6 |
| 2017 | 10 |
| 2018 | 8 |
| 2019 | 11 |
| 2020 | 8 |
| 2021 | 8 |
| 2022 | 6 |
| 2023 | 4 |
| 2024 | 5 |
| 2025 | 5 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Learning device and cutting process evaluation system
US-11402810-B2 · Aug 2, 2022 · US
Method for manufacturing laminated steel sheet, apparatus for manufacturing laminated steel sheet, and curable composition used for the same
US-2022055088-A1 · Feb 24, 2022 · US
Localized resistance annealing process
US-2022017982-A1 · Jan 20, 2022 · US
Manufacturing method of middle member structure
US-11219940-B2 · Jan 11, 2022 · US
Systems and methods for trimming powered cards and devices
US-11207794-B1 · Dec 28, 2021 · US
Method for producing a steel component assembly and steel component assembly
US-11203050-B2 · Dec 21, 2021 · US
Polygon prism torsion bar
US-2021317889-A1 · Oct 14, 2021 · US
Electromechanical brake booster and method for manufacturing an electromechanical brake booster
US-2021245724-A1 · Aug 12, 2021 · US
Position sensor assembly
US-10998799-B2 · May 4, 2021 · US
Punch press
US-10953452-B2 · Mar 23, 2021 · US
Numerical controller
US-10955817-B2 · Mar 23, 2021 · US
Punching apparatus
US-2021078062-A1 · Mar 18, 2021 · US
Reorientable rotatable processing tool
US-10792722-B2 · Oct 6, 2020 · US
Learning device and cutting process evaluation system
US-2020254501-A1 · Aug 13, 2020 · US
Vehicle stabilizer, processing device for eye portion of stabilizer, and processing method for eye portion
US-10696122-B2 · Jun 30, 2020 · US
Shearing method
US-10639699-B2 · May 5, 2020 · US
Manufacturing method of middle member structure
US-2020108434-A1 · Apr 9, 2020 · US
Method for Producing a Steel Component Assembly and Steel Component Assembly
US-2020086374-A1 · Mar 19, 2020 · US
Die with profiled base wall
US-10562204-B2 · Feb 18, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B21D28/24?
- CPC B21D28/24 is the Cooperative Patent Classification code for “Perforating, i.e. punching holes.”
- How many patents are filed under CPC B21D28/24 (Perforating, i.e. punching holes)?
- Our database includes 76 publications tagged with this CPC code.
- Is patent activity under CPC B21D28/24 growing?
- Publication counts under this code: 5 in 2024 vs 5 in 2025 (latest complete years).