Variable color shade marker
US-12251959-B2 · Mar 18, 2025 · US
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specially adapted for concentrated ink, e.g. solid ink
specially adapted for concentrated ink, e.g. solid ink · 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 | B43K5/03 |
| Official title | specially adapted for concentrated ink, e.g. solid ink |
| Display label | specially adapted for concentrated ink, e.g. solid ink |
| Total patents | 15 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2019 | 1 |
| 2021 | 1 |
| 2022 | 3 |
| 2023 | 4 |
| 2024 | 3 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
System with salt-based color adjustment of substrate
US-12197059-B2 · Jan 14, 2025 · US
A replaceable cartridge for a writing instrument and method thereof
US-2025010654-A1 · Jan 9, 2025 · US
Variable color shade marker
US-2024300258-A1 · Sep 12, 2024 · US
Refillable free ink writing instrument, kit comprising such a writing instrument, and method thereof
US-12030337-B2 · Jul 9, 2024 · US
Nib for writing felt pen
US-11926171-B2 · Mar 12, 2024 · US
System with salt-based color adjustment of substrate
US-2023314858-A1 · Oct 5, 2023 · US
Refillable free ink writing instrument, kit comprising such a writing instrument, and method thereof
US-2023311557-A1 · Oct 5, 2023 · US
Handheld writing tool having improved cap-off time
US-2023242780-A1 · Aug 3, 2023 · US
Nib for writing felt pen
US-11697302-B2 · Jul 11, 2023 · US
Nib for writing felt pen
US-2022388330-A1 · Dec 8, 2022 · US
Nib for writing felt pen
US-2022339959-A1 · Oct 27, 2022 · US
Refill for a writing felt pen
US-11390108-B2 · Jul 19, 2022 · US
Refill for a writing felt pen
US-2021031556-A1 · Feb 4, 2021 · US
Writing apparatus and a method of dispensing writing fluid on a writing surface
US-2019001736-A1 · Jan 3, 2019 · US