Writing tool refill and writing tool using same
US-10569596-B2 · Feb 25, 2020 · US
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Reservoirs with ink-level inspection means
Reservoirs with ink-level inspection means · 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 | B43K7/06 |
| Official title | Reservoirs with ink-level inspection means |
| Display label | Reservoirs with ink-level inspection means |
| Total patents | 5 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity appears to be declining based on the most recent years.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 1 |
| 2018 | 2 |
| 2020 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Cosmetic applicator
US-10143288-B2 · Dec 4, 2018 · US
Writing tool refill and writing tool using same
US-2018236807-A1 · Aug 23, 2018 · US
Cosmetic applicator
US-2016295990-A1 · Oct 13, 2016 · US
Combination pen refill cartridge and active stylus
US-9129180-B2 · Sep 8, 2015 · US