Core-sheath conjugate fiber for artificial hair, hair ornament including same, and method for producing same
US-12522952-B2 · Jan 13, 2026 · US
Hairpieces, e.g. hair extensions
Hairpieces, e.g. hair extensions · Cooperative Patent Classification (CPC)
Agriculture, food, personal care, health, and life sciences.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | A41G5/004 |
| Official title | {Hairpieces, e.g. hair extensions} |
| Display label | Hairpieces, e.g. hair extensions |
| Total patents | 59 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 3 |
| 2017 | 3 |
| 2018 | 6 |
| 2019 | 4 |
| 2020 | 3 |
| 2021 | 7 |
| 2022 | 7 |
| 2023 | 6 |
| 2024 | 11 |
| 2025 | 4 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Polyacrylonitrile-based fiber bundle for artificial hair, headdress product containing same, and method for manufacturing same
US-2026002289-A1 · Jan 1, 2026 · US
Artificial hair
US-2025288040-A1 · Sep 18, 2025 · US
Health-level measuring method, health-level determining apparatus, and hair-health examination system
US-12326438-B2 · Jun 10, 2025 · US
Fibers for hair, method for producing same, fiber treatment agent and hair accessory
US-2025066992-A1 · Feb 27, 2025 · US
Colored fiber, method for manufacturing colored fiber, and fiber product
US-2025027232-A1 · Jan 23, 2025 · US
Acrylic fiber for artificial hair, crimped acrylic fiber for artificial hair, hair ornament product including the same, and production method therefor
US-2024417889-A1 · Dec 19, 2024 · US
Core-sheath composite fiber for artificial hair, headdress product including same, and production method therefor
US-12167762-B2 · Dec 17, 2024 · US
Acrylic fiber for artificial hair, hair ornament product including the same, and production method therefor
US-2024401243-A1 · Dec 5, 2024 · US
Antibacterial polyacrylonitrile-based synthetic fiber, method for producing same, and headdress product
US-2024368830-A1 · Nov 7, 2024 · US
Fiber for artificial hair and hair ornament product including same
US-12102151-B2 · Oct 1, 2024 · US
Fiber bundle for artificial hair and hair ornament product including the same
US-2024318357-A1 · Sep 26, 2024 · US
Hair attachment, hair attachment unit, and method of attaching hair attachment
US-12089676-B2 · Sep 17, 2024 · US
Antibacterial acrylic artificial hair fibers, hair ornament product including same, and method for producing same
US-2024240363-A1 · Jul 18, 2024 · US
Acrylic fiber for artificial hair, method for manufacturing said fiber, and headdress product containing said fiber
US-12031239-B2 · Jul 9, 2024 · US
Artificial hair, head decoration product including same, and artificial hair production method
US-12016414-B2 · Jun 25, 2024 · US
Artificial hair, artificial hair unit, artificial hair application method, and method of applying artificial hair unit
US-11974620-B2 · May 7, 2024 · US
Core-sheath conjugate fiber for artificial hair, hair ornament including same, and method for producing same
US-2023416946-A1 · Dec 28, 2023 · US
Core-sheath conjugate fiber for artificial hair, hair ornament including same, and method for producing same
US-2023416947-A1 · Dec 28, 2023 · US
Polyamide hollow fiber for artificial hair, head accessory including same, and method for manufacturing polyamide hollow fiber for artificial hair
US-2023380532-A1 · Nov 30, 2023 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC A41G5/004?
- CPC A41G5/004 is the Cooperative Patent Classification code for “Hairpieces, e.g. hair extensions.”
- How many patents are filed under CPC A41G5/004 (Hairpieces, e.g. hair extensions)?
- Our database includes 59 publications tagged with this CPC code.
- Is patent activity under CPC A41G5/004 growing?
- Publication counts under this code: 11 in 2024 vs 4 in 2025 (latest complete years).