Disc spring manufacturing method, and disc spring
US-2025264142-A1 · Aug 21, 2025 · US
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to flat spiral
to flat spiral · 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 | B21F3/08 |
| Official title | to flat spiral |
| Display label | to flat spiral |
| Total patents | 16 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2017 | 2 |
| 2019 | 1 |
| 2020 | 1 |
| 2021 | 1 |
| 2022 | 3 |
| 2023 | 1 |
| 2024 | 4 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Device for separating wound in balance springs after an expansion cycle, and method for manufacturing a balance spring comprising a separation step carried out by such a device
US-2025199475-A1 · Jun 19, 2025 · US
Hairpin type stator coil forming method
US-12184134-B2 · Dec 31, 2024 · US
Spiral spring for a horological movement
US-11913094-B2 · Feb 27, 2024 · US
Spiral spring for a horological movement
US-11898225-B2 · Feb 13, 2024 · US
Stacking method for stacking wave winding wires, magazine for use therein and uses thereof
US-2024030792-A1 · Jan 25, 2024 · US
Hairpin Type Stator Coil Forming Apparatus and Forming Method
US-2023010359-A1 · Jan 12, 2023 · US
Hairpin type stator coil forming apparatus
US-11496028-B2 · Nov 8, 2022 · US
Spiral spring for a horological movement
US-2022298611-A1 · Sep 22, 2022 · US
Spiral spring for a horological movement
US-2022298610-A1 · Sep 22, 2022 · US
Hairpin Type Stator Coil Forming Apparatus and Forming Method
US-2021104941-A1 · Apr 8, 2021 · US
METASTABLE ß TITANIUM ALLOY, TIMEPIECE SPRING MADE FROM SUCH AN ALLOY AND METHOD FOR PRODUCTION THEREOF
US-2020308685-A1 · Oct 1, 2020 · US
Method for press-rolling a timepiece mainspring
US-10456825-B2 · Oct 29, 2019 · US
Method for press-rolling a timepiece mainspring
US-2017355012-A1 · Dec 14, 2017 · US
Spiral spring manufacturing method
US-9782819-B2 · Oct 10, 2017 · US
Spiral spring manufacturing method
US-2016167106-A1 · Jun 16, 2016 · US