A47L 4/00
Cleaning window shades, window screens, venetian blinds
Official title: Cleaning window shades, window screens, venetian blinds (A47L1/15 takes precedence; suction cleaner nozzles A47L9/02)
A47L4/00 (Cleaning window shades, window screens, venetian blinds) appears on 81 US grants and 29 published applications in this corpus.
Search patents in A47L- Granted patents
- 81
- Published applications
- 29
- Assignees
- 16
- Inventors
- 118
- Latest grant
- 2 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 9 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 1 |
| 2004 | 1 | 2 |
| 2005 | 3 | 2 |
| 2006 | 1 | 1 |
| 2007 | 1 | 0 |
| 2008 | 2 | 1 |
| 2009 | 0 | 2 |
| 2010 | 1 | 2 |
| 2011 | 1 | 1 |
| 2012 | 3 | 0 |
| 2013 | 0 | 1 |
| 2014 | 1 | 0 |
| 2015 | 1 | 1 |
| 2016 | 0 | 3 |
| 2017 | 1 | 2 |
| 2018 | 1 | 3 |
| 2019 | 1 | 1 |
| 2020 | 2 | 3 |
| 2021 | 2 | 0 |
| 2022 | 2 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- End stripper for flexible screen frame material2 Dec 2025US 12,485,453 B2Erdman Automation Corporation
- Ceiling fan cleaner27 Sep 2022US 11,452,415 B2
- Fan cleaner assembly1 Mar 2022US 11,261,882 B2
- Sunshade system for indoor brightness and temperature control6 Apr 2021US 10,968,690 B2
- Conveying device2 Feb 2021US 10,906,788 B2Yugen Kaisha Atsumi Bunji Shoten
- Window Blind Cleaner Stand1 Oct 2026US 2026/0294183 A1
- End stripper for flexible screen frame material9 Oct 2025US 2025/0312827 A1Erdman Automation Corporation
- Sunshade system for indoor brightness and temperature control11 Jun 2020US 2020/0181974 A1
- Fan cleaner assembly7 May 2020US 2020/0141424 A1
- Conveying device9 Jan 2020US 2020/0010309 A1Yugen Kaisha Atsumi Bunji Shoten
Most cited
By later US patents