Porous cap felt pen
US-12479232-B2 · Nov 25, 2025 · US
Writing-points comprising fibres; Felt pads
Writing-points comprising fibres; Felt pads · 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 | B43K1/12 |
| Official title | Writing-points comprising fibres; Felt pads |
| Display label | Writing-points comprising fibres; Felt pads |
| Total patents | 65 |
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 |
| 2017 | 3 |
| 2018 | 2 |
| 2019 | 4 |
| 2020 | 6 |
| 2021 | 8 |
| 2022 | 14 |
| 2023 | 10 |
| 2024 | 6 |
| 2025 | 8 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Electronic pen and electronic pen core body
US-2025138652-A1 · May 1, 2025 · US
Porous cap felt pen
US-2025033401-A1 · Jan 30, 2025 · US
Non-smear nib and associated writing instruments
US-12179508-B2 · Dec 31, 2024 · US
Writing instruments and associated methods
US-12064989-B2 · Aug 20, 2024 · US
Color linker
US-12036814-B2 · Jul 16, 2024 · US
Nib for writing felt pen
US-11926171-B2 · Mar 12, 2024 · US
Writing implement
US-2024051329-A1 · Feb 15, 2024 · US
Writing instrument comprising a switchable flow material
US-11884092-B2 · Jan 30, 2024 · US
Fiber-bundled part for writing instruments, and pen tip and writing instrument using the fiber-bundled part
US-2023406029-A1 · Dec 21, 2023 · US
Marker for variable shading under pressure
US-11827048-B2 · Nov 28, 2023 · US
Process of preparation of an aqueous gel ink with fixed color comprising gold nanoparticles
US-11820905-B2 · Nov 21, 2023 · US
Process of preparation of an aqueous gel ink with variable color comprising silver nanoparticles
US-11802214-B2 · Oct 31, 2023 · US
Writing nib assemblies and writing instruments
US-2023339255-A1 · Oct 26, 2023 · US
Writing instruments and associated nib assemblies
US-2023226844-A1 · Jul 20, 2023 · US
Nib for writing felt pen
US-11697302-B2 · Jul 11, 2023 · US
Oil-based ink composition for writing instrument
US-11649363-B2 · May 16, 2023 · US
Nib for writing felt pen
US-11607902-B2 · Mar 21, 2023 · US
Nib for writing felt pen
US-11597231-B2 · Mar 7, 2023 · US
Nib for writing felt pen
US-2022388330-A1 · Dec 8, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B43K1/12?
- CPC B43K1/12 is the Cooperative Patent Classification code for “Writing-points comprising fibres; Felt pads.”
- How many patents are filed under CPC B43K1/12 (Writing-points comprising fibres; Felt pads)?
- Our database includes 65 publications tagged with this CPC code.
- Is patent activity under CPC B43K1/12 growing?
- Publication counts under this code: 6 in 2024 vs 8 in 2025 (latest complete years).