Pen with multiple colors
US-11529824-B2 · Dec 20, 2022 · US
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flexible
flexible · 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 | B43K5/04 |
| Official title | flexible |
| Display label | flexible |
| Total patents | 13 |
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 | 2 |
| 2018 | 1 |
| 2019 | 2 |
| 2020 | 2 |
| 2021 | 3 |
| 2022 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Refill for a writing felt pen
US-11390108-B2 · Jul 19, 2022 · US
Writing felt pen
US-11364736-B2 · Jun 21, 2022 · US
Pen with multiple colors
US-2021387470-A1 · Dec 16, 2021 · US
Pressure difference compensation membrane
US-10994568-B2 · May 4, 2021 · US
Refill for a writing felt pen
US-2021031556-A1 · Feb 4, 2021 · US
Writing felt pen
US-2020398605-A1 · Dec 24, 2020 · US
Pressure difference compensation membrane
US-2020094609-A1 · Mar 26, 2020 · US
Pressure difference compensation membrane
US-10518572-B2 · Dec 31, 2019 · US
Pressure difference compensation membrane
US-2019152253-A1 · May 23, 2019 · US
Fountain pen
US-9902191-B2 · Feb 27, 2018 · US
Fountain pen
US-2015298487-A1 · Oct 22, 2015 · US
Writing implement refill and writing implement
US-9162515-B2 · Oct 20, 2015 · US