A47L 9/10
Filters
Official title: Filters (in general B01D; cyclones B04C); Dust separators; Dust removal; Automatic exchange of filters {(for machines for cleaning floors A47L11/40)}
A47L9/10 (Filters) appears on 3,503 US grants and 4,204 published applications in this corpus.
Search patents in A47L- Granted patents
- 3,503
- Published applications
- 4,204
- Assignees
- 709
- Inventors
- 4,326
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 8 | 0 |
| 1978 | 14 | 0 |
| 1979 | 7 | 0 |
| 1980 | 12 | 0 |
| 1981 | 11 | 0 |
| 1982 | 12 | 0 |
| 1983 | 11 | 0 |
| 1984 | 7 | 0 |
| 1985 | 12 | 0 |
| 1986 | 14 | 0 |
| 1987 | 20 | 0 |
| 1988 | 14 | 0 |
| 1989 | 21 | 0 |
| 1990 | 14 | 0 |
| 1991 | 26 | 0 |
| 1992 | 34 | 0 |
| 1993 | 21 | 0 |
| 1994 | 16 | 0 |
| 1995 | 12 | 0 |
| 1996 | 10 | 0 |
| 1997 | 17 | 0 |
| 1998 | 29 | 0 |
| 1999 | 39 | 0 |
| 2000 | 44 | 0 |
| 2001 | 60 | 25 |
| 2002 | 52 | 72 |
| 2003 | 62 | 73 |
| 2004 | 56 | 116 |
| 2005 | 50 | 131 |
| 2006 | 57 | 138 |
| 2007 | 82 | 160 |
| 2008 | 84 | 128 |
| 2009 | 98 | 136 |
| 2010 | 116 | 142 |
| 2011 | 100 | 83 |
| 2012 | 75 | 132 |
| 2013 | 103 | 101 |
| 2014 | 118 | 144 |
| 2015 | 127 | 109 |
| 2016 | 106 | 163 |
| 2017 | 121 | 230 |
| 2018 | 139 | 220 |
| 2019 | 212 | 255 |
| 2020 | 220 | 290 |
| 2021 | 183 | 256 |
| 2022 | 227 | 223 |
| 2023 | 198 | 245 |
| 2024 | 193 | 250 |
| 2025 | 126 | 197 |
| 2026 | 99 | 185 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Debris bin6 Oct 2026US 12,751,589 B2Shenzhen Silver Star Intelligent Group Co., Ltd.
- Cleaning system and cleaning method6 Oct 2026US 12,751,590 B2Pixart Imaging Inc.
- Surface cleaning apparatus29 Sep 2026US 12,745,882 B2Omachron Intellectual Property Inc.
- Dust collection bin and cleaning apparatus comprising same29 Sep 2026US 12,745,883 B2Samsung Electronics Co., Ltd.
- Pad washing dock for mobile cleaning robots29 Sep 2026US 12,745,889 B2iRobot Corporation
- Vacuum cleaner with two turbines, and operating method for same8 Oct 2026US 2026/0305892 A1Hilti Aktiengesellschaft
- Waste tape recovery device8 Oct 2026US 2026/0305894 A1Fuji Corporation
- User-prompted cleaning by autonomous vacuum8 Oct 2026US 2026/0305895 A1Matic Robots, Inc. (fka Matician, Inc.)
- Surface cleaning apparatus1 Oct 2026US 2026/0294184 A1Omachron Intellectual Property Inc.
- Scented vacuum filter pad1 Oct 2026US 2026/0294185 A1
Most cited
By later US patents
- Autonomous floor-cleaning robot453US 6,883,201 B2iRobot Corporation · 2005
- Cyclonic back-pack vacuum cleaner370US 5,267,371 AIona Appliances Inc. · 1993
- Autonomous floor cleaning robot349US 7,636,982 B2iRobot Corporation · 2009
- Air filter arrangement having first and second filter media dividing a housing and methods343US 6,210,469 B1Donaldson Company, Inc. · 2001
- Vacuum cleaner having a cyclone type dust collecting apparatus333US 6,406,505 B1Samsung Kwangju Electronics Co., Ltd. · 2002