A47L 9/281
The amount or condition of incoming dirt or dust
Official title: {the amount or condition of incoming dirt or dust}
A47L9/281 (The amount or condition of incoming dirt or dust) appears on 260 US grants and 307 published applications in this corpus.
Search patents in A47L- Granted patents
- 260
- Published applications
- 307
- Assignees
- 120
- Inventors
- 676
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 7 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 5 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 1 |
| 2003 | 0 | 1 |
| 2004 | 1 | 4 |
| 2005 | 1 | 6 |
| 2006 | 0 | 1 |
| 2007 | 2 | 6 |
| 2008 | 2 | 6 |
| 2009 | 2 | 4 |
| 2010 | 3 | 8 |
| 2011 | 1 | 1 |
| 2012 | 5 | 12 |
| 2013 | 7 | 5 |
| 2014 | 4 | 8 |
| 2015 | 7 | 7 |
| 2016 | 7 | 8 |
| 2017 | 7 | 12 |
| 2018 | 12 | 20 |
| 2019 | 12 | 25 |
| 2020 | 15 | 35 |
| 2021 | 16 | 36 |
| 2022 | 27 | 21 |
| 2023 | 20 | 29 |
| 2024 | 32 | 17 |
| 2025 | 16 | 17 |
| 2026 | 10 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Cleaning system and cleaning method6 Oct 2026US 12,751,590 B2Pixart Imaging Inc.
- Floor treatment by means of an autonomous mobile robot4 Aug 2026US 12,697,006 B2Papst Licensing GmbH & Co. KG
- Self-actuated cleaning head for an autonomous vacuum21 Jul 2026US 12,685,418 B2Matic Robots, Inc.
- Evacuation station7 Jul 2026US 12,672,747 B2iRobot Corporation
- System and method for cleaning a space using an autonomous cleaning robot2 Jun 2026US 12,642,406 B1King Saud University
- User-prompted cleaning by autonomous vacuum8 Oct 2026US 2026/0305895 A1Matic Robots, Inc. (fka Matician, Inc.)
- Surface treatment apparatus rotational speed indicator user interface27 Aug 2026US 2026/0248336 A1SharkNinja Operating LLC
- Ventilation and Particulate Matter Removal System20 Aug 2026US 2026/0240381 A1
- Improved industrial dust extractors30 Jul 2026US 2026/0216630 A1Husqvarna AB
- System and method for detecting walls or objects within a specific proximity of a vacuum floor nozzle23 Jul 2026US 2026/0207021 A1SharkNinja Operating LLC
Most cited
By later US patents
- Automatic machine and device for floor dusting439US 5,787,545 A1998
- Electronic vacuum cleaner control system266US 5,542,146 AAB Electrolux · 1996
- Cleaner257US 5,613,261 AMinolta Co., Ltd. · 1997
- Debris sensor for cleaning apparatus246US 6,956,348 B2iRobot Corporation · 2005
- Microcomputer control system for a canister vacuum cleaner206US 4,654,924 AWhirlpool Corporation · 1987