Liquid storing tank having a first chamber and a second chamber below the first chamber
US-2018370242-A1 · Dec 27, 2018 · US
using optical means for ink level indication
using optical means for ink level indication · 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 | B41J2002/17573 |
| Official title | {using optical means for ink level indication} |
| Display label | using optical means for ink level indication |
| Total patents | 681 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 14 |
| 2016 | 7 |
| 2017 | 31 |
| 2018 | 60 |
| 2019 | 99 |
| 2020 | 115 |
| 2021 | 93 |
| 2022 | 77 |
| 2023 | 88 |
| 2024 | 47 |
| 2025 | 46 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Makeup Fluid and Inkjet Printer Apparatus
US-2018304639-A1 · Oct 25, 2018 · US
Liquid supply device including liquid container and external member, and printing device including same
US-10105961-B2 · Oct 23, 2018 · US
Image recording apparatus
US-2018281440-A1 · Oct 4, 2018 · US
Tank and liquid consuming apparatus
US-2018281442-A1 · Oct 4, 2018 · US
Liquid discharge apparatus
US-2018281397-A1 · Oct 4, 2018 · US
Liquid ejection apparatus and liquid container
US-2018257382-A1 · Sep 13, 2018 · US
Image-recording apparatus including wall portion provided in storage chamber of tank connectable to liquid cartridge
US-2018215165-A1 · Aug 2, 2018 · US
Inkjet recording device
US-2017361620-A1 · Dec 21, 2017 · US
Ink bottle
US-2017355191-A1 · Dec 14, 2017 · US
Liquid ejecting apparatus and liquid ejecting method
US-9840085-B2 · Dec 12, 2017 · US
Recording device
US-2017313107-A1 · Nov 2, 2017 · US
Liquid cartridge
US-9802419-B2 · Oct 31, 2017 · US
Tank and liquid consuming apparatus including the same
US-2017282572-A1 · Oct 5, 2017 · US
Tank and liquid consuming apparatus including the same
US-2017282579-A1 · Oct 5, 2017 · US
Tank and liquid consuming apparatus including the same
US-2017282573-A1 · Oct 5, 2017 · US
Tank and liquid consuming apparatus including the same
US-2017282576-A1 · Oct 5, 2017 · US
Tank and liquid consuming apparatus including the same
US-2017282574-A1 · Oct 5, 2017 · US
Tank and liquid consuming apparatus including the same
US-2017282575-A1 · Oct 5, 2017 · US
Liquid cartridge having detection member movable in accordance with deformation of deformable member
US-2017282584-A1 · Oct 5, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B41J2002/17573?
- CPC B41J2002/17573 is the Cooperative Patent Classification code for “using optical means for ink level indication.”
- How many patents are filed under CPC B41J2002/17573 (using optical means for ink level indication)?
- Our database includes 681 publications tagged with this CPC code.
- Is patent activity under CPC B41J2002/17573 growing?
- Publication counts under this code: 47 in 2024 vs 46 in 2025 (latest complete years).