A47L 9/12
Dry filters
A47L9/12 (Dry filters) appears on 1,110 US grants and 1,465 published applications in this corpus.
Search patents in A47L- Granted patents
- 1,110
- Published applications
- 1,465
- Assignees
- 292
- Inventors
- 1,614
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 6 | 0 |
| 1992 | 7 | 0 |
| 1993 | 6 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 6 | 0 |
| 1998 | 2 | 0 |
| 1999 | 13 | 0 |
| 2000 | 15 | 0 |
| 2001 | 21 | 12 |
| 2002 | 19 | 17 |
| 2003 | 15 | 18 |
| 2004 | 12 | 41 |
| 2005 | 16 | 48 |
| 2006 | 21 | 25 |
| 2007 | 27 | 36 |
| 2008 | 28 | 30 |
| 2009 | 19 | 26 |
| 2010 | 24 | 46 |
| 2011 | 15 | 21 |
| 2012 | 14 | 26 |
| 2013 | 30 | 30 |
| 2014 | 34 | 40 |
| 2015 | 35 | 20 |
| 2016 | 26 | 40 |
| 2017 | 35 | 103 |
| 2018 | 37 | 93 |
| 2019 | 101 | 102 |
| 2020 | 100 | 134 |
| 2021 | 69 | 105 |
| 2022 | 97 | 75 |
| 2023 | 74 | 95 |
| 2024 | 73 | 117 |
| 2025 | 56 | 86 |
| 2026 | 24 | 79 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Surface cleaning apparatus8 Sep 2026US 12,727,731 B2Omachron Intellectual Property Inc.
- Vacuum cleaner1 Sep 2026US 12,721,487 B2SharkNinja Operating LLC
- Dust and allergen control for surface cleaning apparatus1 Sep 2026US 12,722,884 B2Omachron Intellectual Property Inc.
- Vacuum cleaning device4 Aug 2026US 12,697,005 B2Black & Decker Inc.
- Surface cleaning apparatus14 Jul 2026US 12,678,001 B2Omachron Intellectual Property Inc.
- 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
- Scented vacuum filter pad1 Oct 2026US 2026/0294185 A1
- Vacuum cleaner having two stages of spiral separation structures1 Oct 2026US 2026/0294191 A1
- Hand carryable surface cleaning apparatus24 Sep 2026US 2026/0283417 A1Omachron Intellectual Property Inc.
Most cited
By later US patents
- Cyclonic back-pack vacuum cleaner370US 5,267,371 AIona Appliances Inc. · 1993
- Air filter arrangement having first and second filter media dividing a housing and methods343US 6,210,469 B1Donaldson Company, Inc. · 2001
- Vacuum filter257US 5,230,722 AAmway Corporation · 1993
- Coverage robot mobility237US 7,441,298 B2iRobot Corporation · 2008
- Cleanable high efficiency filter media structure and applications for use231US 7,008,465 B2Donaldson Company, Inc. · 2006