A45D 20/04
Hot-air producers
Official title: Hot-air producers (A45D20/20, A45D20/22 take precedence)
A45D20/04 (Hot-air producers) appears on 1,005 US grants and 1,182 published applications in this corpus.
Search patents in A45D- Granted patents
- 1,005
- Published applications
- 1,182
- Assignees
- 371
- Inventors
- 1,871
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 3 | 0 |
| 1978 | 8 | 0 |
| 1979 | 4 | 0 |
| 1980 | 17 | 0 |
| 1981 | 10 | 0 |
| 1982 | 11 | 0 |
| 1983 | 7 | 0 |
| 1984 | 10 | 0 |
| 1985 | 10 | 0 |
| 1986 | 12 | 0 |
| 1987 | 26 | 0 |
| 1988 | 15 | 0 |
| 1989 | 15 | 0 |
| 1990 | 19 | 0 |
| 1991 | 10 | 0 |
| 1992 | 18 | 0 |
| 1993 | 14 | 0 |
| 1994 | 16 | 0 |
| 1995 | 13 | 0 |
| 1996 | 11 | 0 |
| 1997 | 23 | 0 |
| 1998 | 28 | 0 |
| 1999 | 25 | 0 |
| 2000 | 14 | 0 |
| 2001 | 20 | 5 |
| 2002 | 15 | 16 |
| 2003 | 13 | 27 |
| 2004 | 26 | 26 |
| 2005 | 24 | 33 |
| 2006 | 16 | 36 |
| 2007 | 10 | 28 |
| 2008 | 10 | 27 |
| 2009 | 5 | 25 |
| 2010 | 10 | 26 |
| 2011 | 12 | 27 |
| 2012 | 15 | 27 |
| 2013 | 18 | 34 |
| 2014 | 31 | 26 |
| 2015 | 13 | 38 |
| 2016 | 23 | 51 |
| 2017 | 25 | 61 |
| 2018 | 33 | 53 |
| 2019 | 35 | 46 |
| 2020 | 40 | 56 |
| 2021 | 35 | 80 |
| 2022 | 41 | 70 |
| 2023 | 43 | 78 |
| 2024 | 49 | 110 |
| 2025 | 44 | 102 |
| 2026 | 51 | 74 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Volume hair dryer brush6 Oct 2026US 12,751,532 B2
- Hair care appliance with cooled circuitry6 Oct 2026US 12,751,535 B2SharkNinja Operating LLC
- Haircare appliance29 Sep 2026US 12,745,828 B2Dyson Technology Limited
- Wide voltage adaptable drive and control circuit for hairdryers8 Sep 2026US 12,732,129 B2Shenzhen Jingxintai Houseware Co., Ltd.
- Hair care device, and hair care system1 Sep 2026US 12,721,414 B2Panasonic Intellectual Property Management Co., Ltd.
- Hair styling appliance8 Oct 2026US 2026/0305785 A1Dyson Operations PTE. LTD.
- A haircare appliance8 Oct 2026US 2026/0305786 A1Dyson Technology Limited
- Hair dryer and hair dryer operation mode selection system8 Oct 2026US 2026/0305789 A1Omachron Intellectual Property Inc.
- Hair styling appliance with baffle(s)8 Oct 2026US 2026/0305790 A1Dyson Operations PTE. LTD.
- Hair dryer with cord stowage device1 Oct 2026US 2026/0294069 A1Babyliss Faco Srl
Most cited
By later US patents
- Proximity safety switch suitable for use in a hair dryer for disabling operation646US 6,784,775 B2LJM Associates, Inc. · 2004
- Hair dryer with safety guard air outlet nozzle145US 3,943,329 AClairol Incorporated · 1976
- Delivery system diffuser attachment for a hair dryer133US 5,649,370 A1997
- Hair dryer apparatus adapted for multi-functional usage120US 5,568,691 ASecajo, Ltd. · 1996
- Hair appliance organizer117US 4,871,074 A1989