Liquid storage member for coating tools
US-2025353319-A1 · Nov 20, 2025 · US
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Preventing leakage
Preventing leakage · 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 | B43K7/08 |
| Official title | Preventing leakage |
| Display label | Preventing leakage |
| Total patents | 15 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2017 | 2 |
| 2019 | 3 |
| 2020 | 1 |
| 2021 | 3 |
| 2023 | 1 |
| 2024 | 1 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Liquid storage member for coating tools
US-12275215-B2 · Apr 15, 2025 · US
Liquid storage member for coating tools
US-2024042735-A1 · Feb 8, 2024 · US
Writing tool provided with refill
US-11654711-B2 · May 23, 2023 · US
Refill for writing implements and writing implements using the same
US-11135868-B2 · Oct 5, 2021 · US
Writing tool provided with refill
US-2021178803-A1 · Jun 17, 2021 · US
Pressure difference compensation membrane
US-10994568-B2 · May 4, 2021 · US
Pressure difference compensation membrane
US-2020094609-A1 · Mar 26, 2020 · US
Pressure difference compensation membrane
US-10518572-B2 · Dec 31, 2019 · US
Refill for writing implements and writing implements using the same
US-2019337323-A1 · Nov 7, 2019 · US
Pressure difference compensation membrane
US-2019152253-A1 · May 23, 2019 · US
Writing instrument
US-9636940-B2 · May 2, 2017 · US
Ballpoint pen
US-9533528-B2 · Jan 3, 2017 · US
Writing instrument
US-2015298489-A1 · Oct 22, 2015 · US
Ballpoint pen
US-2015078803-A1 · Mar 19, 2015 · US