Filter arrangement for a vacuum cleaning appliance
US-2024122427-A1 · Apr 18, 2024 · US
Means for cleaning filters
Means for cleaning filters · Cooperative Patent Classification (CPC)
Agriculture, food, personal care, health, and life sciences.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | A47L9/20 |
| Official title | Means for cleaning filters |
| Display label | Means for cleaning filters |
| Total patents | 428 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 19 |
| 2016 | 21 |
| 2017 | 24 |
| 2018 | 27 |
| 2019 | 27 |
| 2020 | 49 |
| 2021 | 40 |
| 2022 | 55 |
| 2023 | 63 |
| 2024 | 40 |
| 2025 | 50 |
| 2026 | 13 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Vacuum
US-9844309-B2 · Dec 19, 2017 · US
Vacuum cleaner
US-2017347851-A1 · Dec 7, 2017 · US
Suction device
US-2017340178-A1 · Nov 30, 2017 · US
Suction device and method for operating a suction device
US-2017340179-A1 · Nov 30, 2017 · US
Vacuum cleaner having a pressing member and a dust collection body with foreign matter control
US-9814363-B2 · Nov 14, 2017 · US
Vacuum cleaner
US-2017319033-A1 · Nov 9, 2017 · US
Vacuum cleaner
US-9775482-B2 · Oct 3, 2017 · US
Device for beating dust and dust collector using same
US-2017274310-A1 · Sep 28, 2017 · US
Surface cleaning apparatus
US-2017265697-A1 · Sep 21, 2017 · US
Surface cleaning apparatus with debris ejector
US-2017258285-A1 · Sep 14, 2017 · US
Power supply arrangement for a suction device and suction device
US-9723963-B2 · Aug 8, 2017 · US
Cleaner
US-2017209013-A1 · Jul 27, 2017 · US
Separating apparatus and vacuum cleaner
US-2017209011-A1 · Jul 27, 2017 · US
Vacuum cleaner
US-9693664-B2 · Jul 4, 2017 · US
Surface cleaning apparatus with debris ejector
US-9687128-B2 · Jun 27, 2017 · US
Filter assembly for a surface cleaning apparatus
US-2017065137-A1 · Mar 9, 2017 · US
Vacuum cleaner and method for cleaning a filter
US-9585533-B2 · Mar 7, 2017 · US
Surface cleaning apparatus with openable filter compartment
US-9572463-B2 · Feb 21, 2017 · US
Method for cleaning a filter of a vacuum cleaning apparatus and vacuum cleaning apparatus therefor
US-2017001136-A1 · Jan 5, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC A47L9/20?
- CPC A47L9/20 is the Cooperative Patent Classification code for “Means for cleaning filters.”
- How many patents are filed under CPC A47L9/20 (Means for cleaning filters)?
- Our database includes 428 publications tagged with this CPC code.
- Is patent activity under CPC A47L9/20 growing?
- Publication counts under this code: 40 in 2024 vs 50 in 2025 (latest complete years).