A47L 9/19
Means for monitoring filtering operation
A47L9/19 (Means for monitoring filtering operation) appears on 222 US grants and 242 published applications in this corpus.
Search patents in A47L- Granted patents
- 222
- Published applications
- 242
- Assignees
- 112
- Inventors
- 465
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 3 | 0 |
| 1978 | 6 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 6 | 0 |
| 2001 | 3 | 1 |
| 2002 | 2 | 2 |
| 2003 | 2 | 4 |
| 2004 | 2 | 8 |
| 2005 | 3 | 12 |
| 2006 | 2 | 4 |
| 2007 | 9 | 12 |
| 2008 | 5 | 10 |
| 2009 | 4 | 5 |
| 2010 | 6 | 5 |
| 2011 | 6 | 9 |
| 2012 | 5 | 8 |
| 2013 | 6 | 7 |
| 2014 | 7 | 18 |
| 2015 | 9 | 9 |
| 2016 | 8 | 12 |
| 2017 | 7 | 7 |
| 2018 | 10 | 9 |
| 2019 | 9 | 14 |
| 2020 | 8 | 15 |
| 2021 | 8 | 24 |
| 2022 | 15 | 9 |
| 2023 | 12 | 14 |
| 2024 | 14 | 8 |
| 2025 | 6 | 9 |
| 2026 | 3 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Cleaning system and cleaning method6 Oct 2026US 12,751,590 B2Pixart Imaging Inc.
- Evacuation station7 Jul 2026US 12,672,747 B2iRobot Corporation
- Cleaning device having vacuum cleaner and docking station and method of controlling the same6 Jan 2026US 12,514,417 B2Samsung Electronics Co., Ltd.
- Method for controlling a clearing process in a vacuum cleaning device, and vacuum cleaning device15 Jul 2025US 12,357,141 B2Hilti Aktiengesellschaft
- Efficient filter cleaning13 May 2025US 12,295,540 B2Hilti Aktiengesellschaft
- Method for determining an initial filter-loading value of an air-moving device9 Jul 2026US 2026/0191383 A1Dyson Technology Limited
- Cleaner station and method of collecting dust of cleaner station2 Jul 2026US 2026/0182798 A1LG Electronics Inc.
- A dust extractor with one or more load sensors16 Apr 2026US 2026/0102863 A1Husqvarna AB
- Method of determining a value of a filter loading of a filter of an air-moving device9 Apr 2026US 2026/0096705 A1Dyson Technology Limited
- Cleaning device having vacuum cleaner and docking station and method of controlling the same26 Mar 2026US 2026/0083290 A1Samsung Electronics Co., Ltd.
Most cited
By later US patents
- Vacuum cleaner with performance monitoring system188US 4,733,431 AWhirlpool Corporation · 1988
- Handheld cleaning appliance185US 7,931,716 B2Dyson Technology Limited · 2011
- Dust indication system for vacuum cleaner170US 5,815,884 AYashima Electric Co., Ltd. · 1998
- Cleaning appliance169US 8,117,712 B2Dyson Technology Limited · 2012
- Cleaning robot roller processing156US 8,087,117 B2iRobot Corporation · 2012