A47C 21/04
Devices for ventilating, cooling or heating
A47C21/04 (Devices for ventilating, cooling or heating) appears on 824 US grants and 1,038 published applications in this corpus.
Search patents in A47C- Granted patents
- 824
- Published applications
- 1,038
- Assignees
- 328
- Inventors
- 1,315
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 4 | 0 |
| 1980 | 6 | 0 |
| 1981 | 6 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 10 | 0 |
| 1988 | 2 | 0 |
| 1989 | 13 | 0 |
| 1990 | 7 | 0 |
| 1991 | 12 | 0 |
| 1992 | 3 | 0 |
| 1993 | 6 | 0 |
| 1994 | 5 | 0 |
| 1995 | 11 | 0 |
| 1996 | 13 | 0 |
| 1997 | 8 | 0 |
| 1998 | 8 | 0 |
| 1999 | 12 | 0 |
| 2000 | 11 | 0 |
| 2001 | 6 | 3 |
| 2002 | 12 | 7 |
| 2003 | 6 | 17 |
| 2004 | 11 | 11 |
| 2005 | 8 | 16 |
| 2006 | 9 | 21 |
| 2007 | 7 | 19 |
| 2008 | 7 | 44 |
| 2009 | 7 | 17 |
| 2010 | 7 | 23 |
| 2011 | 28 | 29 |
| 2012 | 17 | 35 |
| 2013 | 17 | 28 |
| 2014 | 18 | 49 |
| 2015 | 35 | 72 |
| 2016 | 33 | 53 |
| 2017 | 35 | 60 |
| 2018 | 38 | 56 |
| 2019 | 32 | 65 |
| 2020 | 63 | 60 |
| 2021 | 48 | 81 |
| 2022 | 34 | 60 |
| 2023 | 54 | 59 |
| 2024 | 51 | 54 |
| 2025 | 45 | 50 |
| 2026 | 35 | 49 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Temperature regulating foam padding with passive cooling and active heating6 Oct 2026US 12,751,558 B2Variowell Development GmbH
- Bedding system and method29 Sep 2026US 12,745,854 B2Bedgear, LLC
- Features for determining humidity properties of a bed microclimate8 Sep 2026US 12,727,678 B2Sleep Number Corporation
- Patient support surface control, end of life indication, and x-ray cassette sleeve8 Sep 2026US 12,728,054 B2Hill-Rom Services, Inc.
- Nested foam layers in bedding or seating product25 Aug 2026US 12,714,238 B2L&P Property Management Company
- Temperature controlled mattress cover with zones24 Sep 2026US 2026/0283369 A1Eight Sleep Inc.
- Temperature controlled mattress cover with biometric data sensors24 Sep 2026US 2026/0283370 A1Eight Sleep Inc.
- Temperature controlled bed device for determining sleep phase24 Sep 2026US 2026/0284350 A1Eight Sleep Inc.
- Temperature controlled bed device for determining user history24 Sep 2026US 2026/0284351 A1Eight Sleep Inc.
- Control apparatus and bed27 Aug 2026US 2026/0248294 A1Paramount Bed Co., Ltd.
Most cited
By later US patents
- Temperature control for a bed290US 5,948,303 A1999
- Inflatable air cell having combined pneumatically adjusted occupant support and thermal conditioning224US 6,273,810 B1McCord Winn Textron Inc. · 2001
- Apparatus and method for preventing sudden infant death syndrome205US 5,887,304 A1999
- Environmentally-conditioned topper member for beds205US 8,191,187 B2Amerigon Incorporated · 2012
- Climate controlled bed assembly198US 8,181,290 B2Amerigon Incorporated · 2012