E04H 4/1218
Devices for removal of polluted water
Official title: {Devices for removal of polluted water; Circumferential gutters}
E04H4/1218 (Devices for removal of polluted water) appears on 150 US grants and 130 published applications in this corpus.
Search patents in E04H- Granted patents
- 150
- Published applications
- 130
- Assignees
- 62
- Inventors
- 224
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 4 | 0 |
| 1978 | 8 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 4 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 2 |
| 2003 | 0 | 1 |
| 2004 | 3 | 4 |
| 2005 | 2 | 3 |
| 2006 | 1 | 3 |
| 2007 | 1 | 1 |
| 2008 | 2 | 9 |
| 2009 | 1 | 5 |
| 2010 | 0 | 2 |
| 2011 | 0 | 3 |
| 2012 | 3 | 4 |
| 2013 | 2 | 4 |
| 2014 | 0 | 3 |
| 2015 | 4 | 8 |
| 2016 | 3 | 1 |
| 2017 | 8 | 8 |
| 2018 | 3 | 3 |
| 2019 | 5 | 12 |
| 2020 | 7 | 4 |
| 2021 | 15 | 10 |
| 2022 | 7 | 9 |
| 2023 | 7 | 8 |
| 2024 | 2 | 5 |
| 2025 | 6 | 10 |
| 2026 | 7 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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