E03D 1/02
High-level flushing systems
E03D1/02 (High-level flushing systems) appears on 621 US grants and 317 published applications in this corpus.
Search patents in E03D- Granted patents
- 621
- Published applications
- 317
- Assignees
- 121
- Inventors
- 814
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 19 | 0 |
| 1977 | 19 | 0 |
| 1978 | 22 | 0 |
| 1979 | 20 | 0 |
| 1980 | 17 | 0 |
| 1981 | 8 | 0 |
| 1982 | 8 | 0 |
| 1983 | 9 | 0 |
| 1984 | 9 | 0 |
| 1985 | 8 | 0 |
| 1986 | 8 | 0 |
| 1987 | 6 | 0 |
| 1988 | 5 | 0 |
| 1989 | 18 | 0 |
| 1990 | 13 | 0 |
| 1991 | 18 | 0 |
| 1992 | 20 | 0 |
| 1993 | 30 | 0 |
| 1994 | 17 | 0 |
| 1995 | 14 | 0 |
| 1996 | 16 | 0 |
| 1997 | 17 | 0 |
| 1998 | 18 | 0 |
| 1999 | 22 | 0 |
| 2000 | 9 | 0 |
| 2001 | 15 | 3 |
| 2002 | 15 | 16 |
| 2003 | 15 | 9 |
| 2004 | 9 | 14 |
| 2005 | 6 | 13 |
| 2006 | 3 | 9 |
| 2007 | 4 | 9 |
| 2008 | 2 | 14 |
| 2009 | 2 | 8 |
| 2010 | 4 | 26 |
| 2011 | 8 | 17 |
| 2012 | 10 | 8 |
| 2013 | 9 | 10 |
| 2014 | 7 | 9 |
| 2015 | 9 | 17 |
| 2016 | 9 | 13 |
| 2017 | 20 | 19 |
| 2018 | 20 | 12 |
| 2019 | 15 | 15 |
| 2020 | 15 | 10 |
| 2021 | 14 | 13 |
| 2022 | 9 | 14 |
| 2023 | 5 | 13 |
| 2024 | 15 | 11 |
| 2025 | 8 | 9 |
| 2026 | 3 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E03D 1/14Cisterns discharging variable quantities of water also cisterns with bell siphons in538
- E03D 1/06Cisterns with tube siphons47
- E03D 1/22Twin or multiple flushing cisterns37
- E03D 1/20Cisterns with tiltably-mounted containers16
- E03D 1/18Cisterns empty when not in action6
- E03D 1/04Cisterns with bell siphons5
- E03D 1/025Cisterns with floats actuating the flushing2
- E03D 1/16Cisterns for periodical discharge2
Recent patents
- Pneumatic drain valve driving device2 Jun 2026US 12,644,267 B2Kohler (China) Investment Co., Ltd.
- Touchless toilet assembly17 Mar 2026US 12,577,768 B2AS America, Inc.
- System and method for flushing an object13 Jan 2026US 12,523,029 B2P & C Hennessy Holdings, Inc.
- Grey water toilet and flushing method30 Sep 2025US 12,428,828 B2Kohler Co.
- Discharge valve device, flush water tank device, and flush toilet16 Sep 2025US 12,416,142 B2Toto Ltd.
- Pneumatic drain valve driving device17 Sep 2026US 2026/0275694 A1Kohler (China) Investment Co., Ltd.
- Hydraulically controlled flushing device20 Aug 2026US 2026/0243073 A1Aspic
- Toilet flushing apparatus6 Aug 2026US 2026/0226723 A1Flusheco Limited
- Toilet device, flushing system and flushing method therefor16 Apr 2026US 2026/0103876 A1Jomoo Kitchen & Bath Deutschland GmbH
- Hybrid distribution valve, toilet flushing system and toilet5 Feb 2026US 2026/0035896 A1Quanzhou Komoo Intelligent Kitchen & Bath Co., Ltd
Most cited
By later US patents
- Fully automatic toilet system98US 5,036,553 A1991
- Adapter for toilet fitting88US 5,090,066 AFluidmaster, Inc. · 1992
- Flushing apparatus with selective quantity control60US 4,392,260 A1983
- Water saving device for water closet52US 4,145,775 AAmerican Water Engineering Corporation · 1979
- Dual mode flush valve assembly50US 4,651,359 A1987