E03D 11/02
Water-closet bowls
Official title: Water-closet bowls (auxiliary chambers with connections to flushing water for bowl-cleaning utensils E03D9/06; modified for using upwardly-directed sprays E03D9/08; seats or covers A47K13/00 ){; Bowls with a double odour seal optionally with provisions for a good siphonic action; siphons as part of the bowl (parts or details of bowls E03D11/13)}
E03D11/02 (Water-closet bowls) appears on 675 US grants and 747 published applications in this corpus.
Search patents in E03D- Granted patents
- 675
- Published applications
- 747
- Assignees
- 213
- Inventors
- 1,281
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 17 | 0 |
| 1978 | 16 | 0 |
| 1979 | 10 | 0 |
| 1980 | 4 | 0 |
| 1981 | 6 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 5 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 8 | 0 |
| 1991 | 7 | 0 |
| 1992 | 2 | 0 |
| 1993 | 8 | 0 |
| 1994 | 5 | 0 |
| 1995 | 7 | 0 |
| 1996 | 9 | 0 |
| 1997 | 7 | 0 |
| 1998 | 9 | 0 |
| 1999 | 12 | 0 |
| 2000 | 9 | 0 |
| 2001 | 5 | 2 |
| 2002 | 14 | 5 |
| 2003 | 7 | 8 |
| 2004 | 7 | 16 |
| 2005 | 5 | 18 |
| 2006 | 6 | 18 |
| 2007 | 10 | 10 |
| 2008 | 6 | 17 |
| 2009 | 4 | 26 |
| 2010 | 7 | 23 |
| 2011 | 11 | 22 |
| 2012 | 15 | 22 |
| 2013 | 11 | 18 |
| 2014 | 15 | 20 |
| 2015 | 11 | 30 |
| 2016 | 25 | 29 |
| 2017 | 29 | 57 |
| 2018 | 40 | 48 |
| 2019 | 55 | 37 |
| 2020 | 26 | 62 |
| 2021 | 33 | 46 |
| 2022 | 28 | 55 |
| 2023 | 41 | 44 |
| 2024 | 38 | 36 |
| 2025 | 32 | 53 |
| 2026 | 31 | 25 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E03D 11/08Bowls with means producing a flushing water swirl230
- E03D 11/11Bowls combined with a reservoir106
- E03D 11/025Combined with wash-basins, urinals, flushing devices for chamber-pots, bed-pans, or the like93
- E03D 11/10Bowls with closure elements provided between bottom or outlet and the outlet71
- E03D 11/06Bowls with downwardly-extending flanges for the sake of flushing41
- E03D 11/04Bowls of flat shape with only slightly inclined bottom20
Recent patents
- Systems for human waste collection and processing29 Sep 2026US 12,747,570 B2Hamilton Sundstrand Space Systems International, Inc.
- Flush toilet15 Sep 2026US 12,735,882 B2Global One Tech Corporation
- Toilet seat body and toilet15 Sep 2026US 12,735,883 B2Quanzhou Komoo Intelligent Kitchen & Bath Co., Ltd
- Flush toilet15 Sep 2026US 12,735,884 B2Toto Ltd.
- Waste discharge pipe, waste discharge system, waste discharge control method, waste discharge control apparatus, and toilet1 Sep 2026US 12,723,391 B2Quanzhou Komoo Intelligent Kitchen & Bath Co., Ltd
Most cited
By later US patents
- Modular vacuum toilet with line replaceable units58US 6,353,942 B1Evac International Oy · 2002
- Siphon-jet flush water supply system for toilet stool47US 5,502,845 AToto Ltd. · 1996
- Raw sewage disposal apparatus and prefab for accommodating the same45US 5,418,982 AJapanic Corporation · 1995
- Flush toilet43US 6,145,138 AToto Ltd. · 2000
- Electromechanically actuated gate valve apparatus41US 3,941,349 A1976