E04B 5/48
Special adaptations of floors for incorporating ducts
Official title: Special adaptations of floors for incorporating ducts, e.g. for heating or ventilating (in block-shaped elements E04C1/39; in slab- or sheet-shaped elements E04C2/52)
E04B5/48 (Special adaptations of floors for incorporating ducts) appears on 302 US grants and 323 published applications in this corpus.
Search patents in E04B- Granted patents
- 302
- Published applications
- 323
- Assignees
- 169
- Inventors
- 507
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 5 | 0 |
| 1978 | 4 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 5 | 0 |
| 1986 | 7 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 6 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 2 |
| 2002 | 1 | 7 |
| 2003 | 7 | 11 |
| 2004 | 2 | 3 |
| 2005 | 3 | 9 |
| 2006 | 3 | 3 |
| 2007 | 0 | 3 |
| 2008 | 0 | 16 |
| 2009 | 5 | 6 |
| 2010 | 4 | 12 |
| 2011 | 1 | 11 |
| 2012 | 6 | 12 |
| 2013 | 9 | 16 |
| 2014 | 13 | 15 |
| 2015 | 22 | 20 |
| 2016 | 19 | 23 |
| 2017 | 15 | 17 |
| 2018 | 14 | 25 |
| 2019 | 17 | 16 |
| 2020 | 22 | 27 |
| 2021 | 20 | 20 |
| 2022 | 9 | 15 |
| 2023 | 7 | 12 |
| 2024 | 11 | 10 |
| 2025 | 9 | 6 |
| 2026 | 4 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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