E04H 4/1645
Connections to the pool water circulation system
Official title: {Connections to the pool water circulation system}
E04H4/1645 (Connections to the pool water circulation system) appears on 97 US grants and 62 published applications in this corpus.
Search patents in E04H- Granted patents
- 97
- Published applications
- 62
- Assignees
- 39
- Inventors
- 128
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 0 |
| 2002 | 3 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 2 |
| 2005 | 2 | 2 |
| 2006 | 0 | 3 |
| 2007 | 4 | 2 |
| 2008 | 2 | 1 |
| 2009 | 0 | 4 |
| 2010 | 1 | 1 |
| 2011 | 1 | 4 |
| 2012 | 1 | 2 |
| 2013 | 0 | 1 |
| 2014 | 1 | 4 |
| 2015 | 2 | 2 |
| 2016 | 3 | 1 |
| 2017 | 2 | 9 |
| 2018 | 6 | 4 |
| 2019 | 4 | 4 |
| 2020 | 3 | 4 |
| 2021 | 3 | 6 |
| 2022 | 3 | 3 |
| 2023 | 2 | 0 |
| 2024 | 1 | 1 |
| 2025 | 1 | 1 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pool hose air evacuation module26 May 2026US 12,638,120 B2Splash Pool & Spa, Inc.
- Structure for assembling and disassembling dirt suction head to/from filter bag10 Feb 2026US 12,544,692 B2Ningbo Dongchuan Swimming Pool Equipment Co., Inc.
- Bypass mechanism for automatic pool cleaners6 May 2025US 12,292,751 B2Zodiac Pool Systems LLC
- Flow control valve for suction cleaners26 Mar 2024US 11,940,052 B2Hayward Industries, Inc.
- Debris-filter materials principally for automatic swimming pool cleaners14 Nov 2023US 11,814,868 B2Zodiac Pool Systems LLC
- Pool hose air evacuation module27 Mar 2025US 2025/0102097 A1Splash Pool & Spa, Inc.
- Versatile vacuum cleaner for cleaning swimming pools16 May 2024US 2024/0159073 A1Kokido Development Limited
- Structure for assembling and disassembling dirt suction head to/from filter bag30 Jun 2022US 2022/0203271 A1Ningbo Dongchuan Swimming Pool Equipment Co., Inc.
- Bypass mechanism for automatic pool cleaners10 Feb 2022US 2022/0043467 A1Zodiac Pool Systems LLC
- Flow Control Valve For Suction Cleaners20 Jan 2022US 2022/0018449 A1Hayward Industries, Inc.
Most cited
By later US patents
- Water suction powered automatic swimming pool cleaning system126US 6,280,611 B12001
- Automatic swimming pool cleaning system99US 5,985,156 A1999
- Cleaning system for swimming pools and the like72US 4,907,610 ACrystal Pools, Inc. · 1990
- Water suction powered automatic swimming pool cleaning system55US 6,387,250 B12002
- Cleaning of a body of liquid by surface agitation51US 4,778,599 ASpooner Est · 1988