A47L 11/4072
Arrangement of castors or wheels
Official title: {Arrangement of castors or wheels}
A47L11/4072 (Arrangement of castors or wheels) appears on 422 US grants and 478 published applications in this corpus.
Search patents in A47L- Granted patents
- 422
- Published applications
- 478
- Assignees
- 197
- Inventors
- 917
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 3 | 0 |
| 1978 | 8 | 0 |
| 1979 | 4 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 11 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 7 | 0 |
| 1994 | 5 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 6 | 0 |
| 1998 | 2 | 0 |
| 1999 | 8 | 0 |
| 2000 | 6 | 0 |
| 2001 | 4 | 2 |
| 2002 | 1 | 3 |
| 2003 | 3 | 4 |
| 2004 | 1 | 8 |
| 2005 | 4 | 8 |
| 2006 | 4 | 6 |
| 2007 | 2 | 8 |
| 2008 | 5 | 9 |
| 2009 | 0 | 5 |
| 2010 | 4 | 5 |
| 2011 | 3 | 5 |
| 2012 | 3 | 4 |
| 2013 | 12 | 11 |
| 2014 | 10 | 13 |
| 2015 | 10 | 24 |
| 2016 | 9 | 24 |
| 2017 | 20 | 24 |
| 2018 | 21 | 14 |
| 2019 | 26 | 40 |
| 2020 | 17 | 23 |
| 2021 | 38 | 52 |
| 2022 | 20 | 42 |
| 2023 | 29 | 29 |
| 2024 | 32 | 48 |
| 2025 | 23 | 41 |
| 2026 | 17 | 26 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Pressure washing system and method11 Aug 2026US 12,703,014 B2Boyd Equipment & Supply LLC
- Cleaning robot28 Jul 2026US 12,690,737 B2Samsung Electronics Co., Ltd.
- Automated cleaning robot and mop mechanism thereof28 Jul 2026US 12,690,738 B2Ningbo Fujia Industrial Co., Ltd.
- Mobile cleaning robot suspension21 Jul 2026US 12,685,415 B2iRobot Corporation
- User-prompted cleaning by autonomous vacuum8 Oct 2026US 2026/0305895 A1Matic Robots, Inc. (fka Matician, Inc.)
- Robot cleaner and robot cleaner system1 Oct 2026US 2026/0294196 A1LG Electronics Inc.
- Cleaning device with an adjustable squeegee assembly24 Sep 2026US 2026/0283432 A1Wensch Holding B.V.
- Robot cleaner, docking station, and cleaning apparatus comprising same17 Sep 2026US 2026/0272249 A1Samsung Electronics Co., Ltd.
- Cleaning robot27 Aug 2026US 2026/0248337 A1Beijing Roborock Technology Co., Ltd.
Most cited
By later US patents
- Mobile work robot system511US 5,959,423 AMinolta Co., Ltd. · 1999
- Autonomous surface cleaning robot for wet and dry cleaning257US 7,389,156 B2iRobot Corporation · 2008
- Coverage robot mobility237US 7,441,298 B2iRobot Corporation · 2008
- Floor mopping machine160US 5,555,587 AThe Scott Fetzer Company · 1996
- Cleaning members for cleaning areas near walls used in floor cleaner160US 5,794,297 AHoky Contico, L.L.C. · 1998