E04H 4/1281
Devices for distributing chemical products in the water of swimming pools
Official title: {Devices for distributing chemical products in the water of swimming pools}
E04H4/1281 (Devices for distributing chemical products in the water of swimming pools) appears on 258 US grants and 311 published applications in this corpus.
Search patents in E04H- Granted patents
- 258
- Published applications
- 311
- Assignees
- 107
- Inventors
- 383
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 5 | 0 |
| 2002 | 0 | 1 |
| 2003 | 2 | 2 |
| 2004 | 0 | 4 |
| 2005 | 2 | 9 |
| 2006 | 7 | 5 |
| 2007 | 2 | 6 |
| 2008 | 4 | 4 |
| 2009 | 8 | 6 |
| 2010 | 4 | 7 |
| 2011 | 6 | 10 |
| 2012 | 6 | 10 |
| 2013 | 7 | 16 |
| 2014 | 6 | 17 |
| 2015 | 8 | 16 |
| 2016 | 10 | 13 |
| 2017 | 6 | 18 |
| 2018 | 22 | 18 |
| 2019 | 27 | 26 |
| 2020 | 16 | 21 |
| 2021 | 30 | 24 |
| 2022 | 14 | 18 |
| 2023 | 11 | 15 |
| 2024 | 9 | 16 |
| 2025 | 12 | 19 |
| 2026 | 9 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Concepts and methods for pool system communication between connectable devices6 Oct 2026US 12,756,995 B2Fluidra Group Australia Pty Ltd.
- Pool robot and automatic underwater spreading method29 Sep 2026US 12,747,601 B2Xingmai Innovation Technology (Suzhou) Co., Ltd.
- System and a method for changing color of pool lights11 Aug 2026US 12,705,960 B2Pentair Water Pool and Spa, Inc.
- Monitoring and controlling connected pool devices2 Jun 2026US 12,644,300 B2Pentair Water Pool and Spa, Inc.
- Pool chlorine floater with light12 May 2026US 12,624,561 B1Sichuan Cootway Technology Co., Ltd.
- Debris removal sleeve1 Oct 2026US 2026/0297969 A1
- Chlorinators and Replaceable Cell Cartridges Therefor1 Oct 2026US 2026/0297970 A1Hayward Industries, Inc.
- Monitoring and controlling connected pool devices24 Sep 2026US 2026/0286736 A1Pentair Water Pool and Spa, Inc.
- Cleaning device25 Jun 2026US 2026/0175263 A1Xingmai Innovation Technology (Suzhou) Co., Ltd.
- Cleaning device4 Jun 2026US 2026/0152415 A1Xingmai Innovation Technology (Suzhou) Co., Ltd.
Most cited
By later US patents
- Speed control90US 8,043,070 B2Danfoss Low Power Drives, a Division of Danfoss · 2011
- Pumping system with two way communication87US 7,854,597 B2Danfoss Low Power Drives · 2010
- Floating adjustable pool chlorinator71US 5,476,116 ARainbow Lifegard Products, Inc. · 1995
- Speed control67US 8,465,262 B2Pentair Water Pool and Spa, Inc. · 2013
- Automatic swimming pool cleaners and associated components and systems47US 5,882,512 ABaracuda International Corporation · 1999