A45D 20/00
Hair drying devices
Official title: Hair drying devices; Accessories therefor (A45D2/00 takes precedence)
A45D20/00 (Hair drying devices) appears on 1,313 US grants and 1,449 published applications in this corpus.
Search patents in A45D- Granted patents
- 1,313
- Published applications
- 1,449
- Assignees
- 448
- Inventors
- 2,370
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 27 | 0 |
| 1977 | 10 | 0 |
| 1978 | 14 | 0 |
| 1979 | 10 | 0 |
| 1980 | 25 | 0 |
| 1981 | 19 | 0 |
| 1982 | 15 | 0 |
| 1983 | 11 | 0 |
| 1984 | 13 | 0 |
| 1985 | 14 | 0 |
| 1986 | 18 | 0 |
| 1987 | 34 | 0 |
| 1988 | 19 | 0 |
| 1989 | 19 | 0 |
| 1990 | 26 | 0 |
| 1991 | 13 | 0 |
| 1992 | 21 | 0 |
| 1993 | 22 | 0 |
| 1994 | 18 | 0 |
| 1995 | 15 | 0 |
| 1996 | 16 | 0 |
| 1997 | 26 | 0 |
| 1998 | 35 | 0 |
| 1999 | 36 | 0 |
| 2000 | 27 | 0 |
| 2001 | 24 | 6 |
| 2002 | 23 | 27 |
| 2003 | 19 | 37 |
| 2004 | 33 | 37 |
| 2005 | 29 | 43 |
| 2006 | 21 | 41 |
| 2007 | 12 | 44 |
| 2008 | 13 | 35 |
| 2009 | 8 | 34 |
| 2010 | 14 | 34 |
| 2011 | 16 | 36 |
| 2012 | 25 | 36 |
| 2013 | 24 | 37 |
| 2014 | 38 | 36 |
| 2015 | 19 | 53 |
| 2016 | 32 | 64 |
| 2017 | 30 | 75 |
| 2018 | 39 | 66 |
| 2019 | 40 | 55 |
| 2020 | 45 | 71 |
| 2021 | 40 | 87 |
| 2022 | 51 | 84 |
| 2023 | 50 | 91 |
| 2024 | 55 | 125 |
| 2025 | 52 | 111 |
| 2026 | 58 | 84 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- A45D 20/04Hot-air producers1,005
- A45D 20/22Helmets with hot air supply or ventilating means194
- A45D 20/48Hair-drying combs or hair-drying brushes, with internal heating means179
- A45D 20/52Hair-drying combs or hair-drying brushes, adapted for heating by an external heating64
- A45D 20/18Flexible caps with provision for hot air supply37
- A45D 20/20Helmets without hot air supply or other ventilation31
- A45D 20/44Hair-drying helmets whereon the ventilating means and the heating means are apart18
- A45D 20/02Lay frames for long open hair4
Recent patents
- Volume hair dryer brush6 Oct 2026US 12,751,532 B2
- Straightening comb with elastic floating teeth6 Oct 2026US 12,751,533 B2Dongguan Jinfeng Science and Technology Co., Ltd.
- Hair care appliance with cooled circuitry6 Oct 2026US 12,751,535 B2SharkNinja Operating LLC
- Haircare appliance29 Sep 2026US 12,745,828 B2Dyson Technology Limited
- Haircare appliance29 Sep 2026US 12,746,492 B2Dyson Technology Limited
- 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.
- Household appliance having an improved fan and motor assembly and fan and motor assembly for same8 Oct 2026US 2026/0309165 A1Omachron Intellectual Property Inc.
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