A47L 9/2821
Pressure, vacuum level or airflow
Official title: {Pressure, vacuum level or airflow}
A47L9/2821 (Pressure, vacuum level or airflow) appears on 184 US grants and 206 published applications in this corpus.
Search patents in A47L- Granted patents
- 184
- Published applications
- 206
- Assignees
- 113
- Inventors
- 481
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 6 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 0 |
| 2002 | 2 | 2 |
| 2003 | 2 | 2 |
| 2004 | 1 | 5 |
| 2005 | 1 | 4 |
| 2006 | 1 | 8 |
| 2007 | 7 | 2 |
| 2008 | 4 | 5 |
| 2009 | 1 | 1 |
| 2010 | 0 | 2 |
| 2011 | 4 | 2 |
| 2012 | 1 | 3 |
| 2013 | 0 | 3 |
| 2014 | 3 | 4 |
| 2015 | 6 | 3 |
| 2016 | 4 | 13 |
| 2017 | 8 | 9 |
| 2018 | 6 | 14 |
| 2019 | 8 | 17 |
| 2020 | 9 | 16 |
| 2021 | 11 | 14 |
| 2022 | 9 | 16 |
| 2023 | 11 | 16 |
| 2024 | 11 | 15 |
| 2025 | 13 | 17 |
| 2026 | 10 | 13 |
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.
- Vacuum cleaner system notifying state of dust collection part and operating method of vacuum cleaner system6 Oct 2026US 12,751,592 B2Samsung Electronics Co., Ltd.
- Vacuum cleaner and method for controlling the same15 Sep 2026US 12,733,782 B2Samsung Electronics Co., Ltd.
- Autonomous vacuum mopping system4 Aug 2026US 12,696,972 B2Matic Robots, Inc.
- Controller for controlling a floor cleaning device, floor cleaning device and nozzle thereof21 Jul 2026US 12,685,417 B2Versuni Holding B.V.
- Autonomous Vacuum Sweeping System Having a Brush Roller with Buffer Zone1 Oct 2026US 2026/0294091 A1Matic Robots, Inc.
- Systems and methods for active suspension for a robotic vacuum removable cleaning pad9 Jul 2026US 2026/0191375 A1SharkNinja Operating LLC
- Systems and methods for active suspension for a robotic cleaning device9 Jul 2026US 2026/0191377 A1SharkNinja Operating LLC
- Method for determining an initial filter-loading value of an air-moving device9 Jul 2026US 2026/0191383 A1Dyson Technology Limited
- Systems and methods for active suspension for a robotic cleaning device9 Jul 2026US 2026/0191386 A1SharkNinja Operating LLC
Most cited
By later US patents
- Vacuum cleaner with performance monitoring system188US 4,733,431 AWhirlpool Corporation · 1988
- Rotary brush device and vacuum cleaner using the same180US 6,323,570 B1Matsushita Electric Industrial Co., Ltd. · 2001
- Rotary brush device and vacuum cleaner using the same167US 6,400,048 B1Matsushita Electric Industrial Co., Ltd. · 2002
- Vacuum cleaner with operating condition indicator system153US 4,733,430 AWhirlpool Corporation · 1988
- Control and/or indication device for the operation of vacuum cleaners151US 5,033,151 AInterlava AG · 1991