Coil spring manufacturing method
US-2026042138-A1 · Feb 12, 2026 · US
Making springs from wire
Making springs from wire · 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 | B21F35/00 |
| Official title | Making springs from wire |
| Display label | Making springs from wire |
| Total patents | 44 |
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 | 7 |
| 2018 | 4 |
| 2019 | 3 |
| 2020 | 5 |
| 2021 | 4 |
| 2022 | 1 |
| 2023 | 2 |
| 2024 | 7 |
| 2025 | 4 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Coil spring and manufacturing method of the same
US-2025320902-A1 · Oct 16, 2025 · US
Coil spring, suspension device, and coil spring manufacturing method
US-2025230850-A1 · Jul 17, 2025 · US
Coiling machine and production method for coil springs
US-2025178069-A1 · Jun 5, 2025 · US
Coiling machine and coil spring manufacturing method
US-2025178068-A1 · Jun 5, 2025 · US
Method for producing a nonlinear cylindrical spring and use of such a spring
US-2024345605-A1 · Oct 17, 2024 · US
Method for determining propelling condition for shot medium, and method for manufacturing coil spring
US-12097591-B2 · Sep 24, 2024 · US
Coil spring, suspension device, and method for producing coil spring
US-2024229884-A9 · Jul 11, 2024 · US
Coil spring, suspension device, and method for producing coil spring
US-2024133440-A1 · Apr 25, 2024 · US
Coiling machine, method for manufacturing coil spring, and coil spring
US-11964321-B2 · Apr 23, 2024 · US
Copper-based alloy material, production method therefor, and members or parts made of copper-based alloy material
US-11959161-B2 · Apr 16, 2024 · US
Wire rod and steel wire for spring, spring with improved fatigue resistance and nitriding properties, and methods for manufacturing same
US-2024052453-A1 · Feb 15, 2024 · US
Forming method and forming device for arc spring
US-11583917-B2 · Feb 21, 2023 · US
Method for determining propelling condition for shot medium, and method for manufacturing coil spring
US-2023016208-A1 · Jan 19, 2023 · US
Methods for manufacturing a spring, a spring brake, and a spring brake comprising a spring
US-11292048-B2 · Apr 5, 2022 · US
Coiling machine, method for manufacturing coil spring, and coil spring
US-2021362274-A1 · Nov 25, 2021 · US
Coiling machine, method for manufacturing coil spring, and coil spring
US-2021323047-A1 · Oct 21, 2021 · US
Copper-based alloy material, production method therefor, and members or parts made of copper-based alloy material
US-2021317557-A1 · Oct 14, 2021 · US
Forming method and forming device for arc spring
US-2021308740-A1 · Oct 7, 2021 · US
Method for producing hot-formed steel springs
US-10689726-B2 · Jun 23, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B21F35/00?
- CPC B21F35/00 is the Cooperative Patent Classification code for “Making springs from wire.”
- How many patents are filed under CPC B21F35/00 (Making springs from wire)?
- Our database includes 44 publications tagged with this CPC code.
- Is patent activity under CPC B21F35/00 growing?
- Publication counts under this code: 7 in 2024 vs 4 in 2025 (latest complete years).