E03D 1/14
Cisterns discharging variable quantities of water also cisterns with bell siphons in
Official title: Cisterns discharging variable quantities of water (twin or multiple flushing cisterns E03D1/22; flushing devices operated by pressure of the water supply system and discharging variable quantities of water E03D3/12 ){also cisterns with bell siphons in combination with flushing valves}
E03D1/14 (Cisterns discharging variable quantities of water also cisterns with bell siphons in) appears on 538 US grants and 263 published applications in this corpus.
Search patents in E03D- Granted patents
- 538
- Published applications
- 263
- Assignees
- 109
- Inventors
- 736
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 18 | 0 |
| 1977 | 18 | 0 |
| 1978 | 20 | 0 |
| 1979 | 18 | 0 |
| 1980 | 16 | 0 |
| 1981 | 7 | 0 |
| 1982 | 6 | 0 |
| 1983 | 9 | 0 |
| 1984 | 9 | 0 |
| 1985 | 8 | 0 |
| 1986 | 6 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 16 | 0 |
| 1990 | 12 | 0 |
| 1991 | 18 | 0 |
| 1992 | 18 | 0 |
| 1993 | 27 | 0 |
| 1994 | 14 | 0 |
| 1995 | 14 | 0 |
| 1996 | 14 | 0 |
| 1997 | 15 | 0 |
| 1998 | 16 | 0 |
| 1999 | 20 | 0 |
| 2000 | 9 | 0 |
| 2001 | 12 | 2 |
| 2002 | 12 | 15 |
| 2003 | 13 | 9 |
| 2004 | 9 | 13 |
| 2005 | 5 | 13 |
| 2006 | 1 | 8 |
| 2007 | 4 | 9 |
| 2008 | 2 | 14 |
| 2009 | 2 | 7 |
| 2010 | 4 | 23 |
| 2011 | 6 | 14 |
| 2012 | 9 | 8 |
| 2013 | 7 | 10 |
| 2014 | 6 | 4 |
| 2015 | 8 | 15 |
| 2016 | 8 | 12 |
| 2017 | 17 | 12 |
| 2018 | 16 | 8 |
| 2019 | 12 | 13 |
| 2020 | 10 | 9 |
| 2021 | 12 | 9 |
| 2022 | 6 | 8 |
| 2023 | 3 | 10 |
| 2024 | 10 | 7 |
| 2025 | 6 | 6 |
| 2026 | 1 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Pneumatic drain valve driving device2 Jun 2026US 12,644,267 B2Kohler (China) Investment Co., Ltd.
- Discharge valve device, flush water tank device, and flush toilet16 Sep 2025US 12,416,142 B2Toto Ltd.
- Dual-control flushing device9 Sep 2025US 12,410,597 B2
- Water tank drainage volume control structure, and toilet5 Aug 2025US 12,378,755 B2Xiamen R&T Plumbing Technology Co., Ltd.
- Flush toilet apparatus8 Jul 2025US 12,352,028 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
- Flush Valve Assembly1 Jan 2026US 2026/0002348 A1AS America, Inc.
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