Y02A 20/40
Protecting water resources
Y02A20/40 (Protecting water resources) appears on 303 US grants and 280 published applications in this corpus.
Search patents in Y02A- Granted patents
- 303
- Published applications
- 280
- Assignees
- 140
- Inventors
- 596
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 7 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 5 | 0 |
| 1985 | 4 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 7 | 0 |
| 1992 | 7 | 0 |
| 1993 | 6 | 0 |
| 1994 | 6 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 6 | 0 |
| 1998 | 8 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 1 |
| 2002 | 3 | 4 |
| 2003 | 4 | 2 |
| 2004 | 5 | 5 |
| 2005 | 3 | 8 |
| 2006 | 2 | 7 |
| 2007 | 5 | 13 |
| 2008 | 5 | 14 |
| 2009 | 3 | 13 |
| 2010 | 7 | 13 |
| 2011 | 7 | 17 |
| 2012 | 11 | 15 |
| 2013 | 11 | 14 |
| 2014 | 7 | 11 |
| 2015 | 12 | 8 |
| 2016 | 11 | 18 |
| 2017 | 12 | 17 |
| 2018 | 19 | 21 |
| 2019 | 17 | 15 |
| 2020 | 16 | 16 |
| 2021 | 9 | 15 |
| 2022 | 7 | 8 |
| 2023 | 10 | 11 |
| 2024 | 8 | 8 |
| 2025 | 7 | 5 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Shower head capable of being rapidly assembled14 Apr 2026US 12,599,917 B2Kylin Sanitary Technology (Xiamen) Co., Ltd.
- Shower3 Feb 2026US 12,540,461 B2
- Flush toilet23 Sep 2025US 12,421,708 B2Toto Ltd.
- Discharge valve device, flush water tank device, and flush toilet16 Sep 2025US 12,416,142 B2Toto Ltd.
- Shower system having operating handle9 Sep 2025US 12,409,463 B2Protech (Xiamen) Industry Co., Ltd.
- Water Distribution Regulation Method for Reclaimed Waterway Landscape Environments Based on Algae Risk Control5 Mar 2026US 2026/0061379 A1Zhejiang Institute of Hydraulics & Estuary (Zhejiang Institute of Marine Planning and Design)
- Health assessment method of an aquatic ecosystem based on ecological integrity and an application thereof13 Nov 2025US 2025/0348823 A1Beijing Normal University
- Automatic driving unit for toilet drain valve and drain valve assembly16 Oct 2025US 2025/0320705 A1Zhongshan Dongling Weili Clean Technology Co., Ltd.
- Flush toilet3 Apr 2025US 2025/0109581 A1Toto Ltd.
- Faucet water discharge control method, faucet water discharge control system, and storage medium20 Feb 2025US 2025/0059742 A1Bisource Hardware Manufacturing Co., Ltd.
Most cited
By later US patents
- Multi-spray shower head comprising a mist spray and locking device141US 5,551,637 A1996
- Subsurface fluid drainage and storage systems112US 5,848,856 AInvisible Structures, Inc. · 1998
- Flow-rate limiting valve for inserting between a shower hose and a hand shower107US 5,653,260 A1997
- Drainage system97US 5,087,151 A1992
- Adapter for toilet fitting88US 5,090,066 AFluidmaster, Inc. · 1992