Liquid storage member for coating tools
US-2025353319-A1 · Nov 20, 2025 · US
Ink reservoirs
Ink reservoirs · 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 | B43K5/02 |
| Official title | Ink reservoirs |
| Display label | Ink reservoirs |
| Total patents | 27 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2017 | 1 |
| 2018 | 1 |
| 2019 | 3 |
| 2020 | 3 |
| 2021 | 2 |
| 2022 | 3 |
| 2023 | 5 |
| 2024 | 2 |
| 2025 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Ink storage member for writing implements
US-2025313034-A1 · Oct 9, 2025 · US
Output device for uniformly mixed liquid and method for making and using the same
US-12377677-B2 · Aug 5, 2025 · US
Liquid storage member for coating tools
US-12275215-B2 · Apr 15, 2025 · US
Writing implement refill and method of engraving writing implement refill
US-2025115072-A1 · Apr 10, 2025 · US
Fiber-bundled part for writing instruments, and pen tip and writing instrument using the fiber-bundled part
US-12187068-B2 · Jan 7, 2025 · US
Refillable free ink writing instrument provided with a removable tip
US-11938750-B2 · Mar 26, 2024 · US
Liquid storage member for coating tools
US-2024042735-A1 · Feb 8, 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
Output Device for Uniformly Mixed Liquid and Method for Making and Using the Same
US-2023391130-A1 · Dec 7, 2023 · US
Liquid storage member for coating tools
US-11780258-B2 · Oct 10, 2023 · US
Writing board set and peeking prevention system
US-2023311559-A1 · Oct 5, 2023 · US
Nib for writing felt pen
US-11597231-B2 · Mar 7, 2023 · US
Liquid storage member for coating tools
US-2022355612-A1 · Nov 10, 2022 · US
A refillable free ink writing instrument provided with a removable tip
US-2022348035-A1 · Nov 3, 2022 · US
Bearing assembly
US-11319993-B2 · May 3, 2022 · US
Applicator
US-11084316-B2 · Aug 10, 2021 · US
Nib for writing felt pen
US-2021122181-A1 · Apr 29, 2021 · US
Bearing assembly
US-2020309195-A1 · Oct 1, 2020 · US
Applicator
US-2020130403-A1 · Apr 30, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B43K5/02?
- CPC B43K5/02 is the Cooperative Patent Classification code for “Ink reservoirs.”
- How many patents are filed under CPC B43K5/02 (Ink reservoirs)?
- Our database includes 27 publications tagged with this CPC code.
- Is patent activity under CPC B43K5/02 growing?
- Publication counts under this code: 2 in 2024 vs 6 in 2025 (latest complete years).