A45D 4/00
Separate devices designed for heating hair curlers or hair-wavers
Official title: Separate devices designed for heating hair curlers or hair-wavers (hair-drying devices without connection to hair curlers or hair-wavers A45D20/00)
A45D4/00 (Separate devices designed for heating hair curlers or hair-wavers) appears on 170 US grants and 95 published applications in this corpus.
Search patents in A45D- Granted patents
- 170
- Published applications
- 95
- Assignees
- 63
- Inventors
- 268
- Latest grant
- 15 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 7 | 0 |
| 1986 | 10 | 0 |
| 1987 | 9 | 0 |
| 1988 | 5 | 0 |
| 1989 | 6 | 0 |
| 1990 | 2 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 6 | 0 |
| 1994 | 9 | 0 |
| 1995 | 2 | 0 |
| 1996 | 7 | 0 |
| 1997 | 7 | 0 |
| 1998 | 10 | 0 |
| 1999 | 5 | 0 |
| 2000 | 7 | 0 |
| 2001 | 4 | 0 |
| 2002 | 3 | 2 |
| 2003 | 0 | 2 |
| 2004 | 1 | 5 |
| 2005 | 1 | 7 |
| 2006 | 2 | 2 |
| 2007 | 2 | 1 |
| 2008 | 0 | 3 |
| 2009 | 3 | 4 |
| 2010 | 1 | 4 |
| 2011 | 1 | 3 |
| 2012 | 3 | 5 |
| 2013 | 3 | 5 |
| 2014 | 2 | 10 |
| 2015 | 2 | 2 |
| 2016 | 2 | 2 |
| 2017 | 0 | 3 |
| 2018 | 0 | 3 |
| 2019 | 1 | 6 |
| 2020 | 3 | 5 |
| 2021 | 0 | 4 |
| 2022 | 4 | 5 |
| 2023 | 1 | 1 |
| 2024 | 3 | 5 |
| 2025 | 3 | 5 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- A45D 4/16Independent devices characterised by heating the hair-curling or hair-waving means before use124
- A45D 4/08Separate devices designed for heating hair curlers or hair-wavers: for flat curling35
- A45D 4/02Separate devices designed for heating hair curlers or hair-wavers: for steep curling19
- A45D 4/18Supports or suspending means for devices heating hair-curling or hair-waving means while3
- A45D 4/14Separate devices designed for heating hair curlers or hair-wavers: with chemical heat1
Recent patents
- Hair curling system15 Jul 2025US 12,357,069 B2Cali-Curl, LLC
- Apparatus for curling hair24 Jun 2025US 12,336,611 B2
- Color conversion system and method11 Mar 2025US 12,245,680 B2B&R Holdings, LLC
- Heat enhanced hair-setting tool17 Sep 2024US 12,089,712 B2Hair4Good, LLC
- Heat-retaining clips for creating textured waves in hair23 Jul 2024US 12,042,034 B2
- Heater for heating a metal eyelash curler and method therefor1 Oct 2026US 2026/0294066 A1
- Heating Unit for Rollers Employing Magnetic Inductance6 Nov 2025US 2025/0338937 A1The Original Heatwaeve LLC
- Hair rollers assembly5 Jun 2025US 2025/0176692 A1Conair Corporation
- Hair roller5 Jun 2025US 2025/0176693 A1Dyson Technology Limited
- Hair roller22 May 2025US 2025/0160496 A1Dyson Technology Limited
Most cited
By later US patents
- Curling iron organizer with temperature display61US 5,794,799 A1998
- Microwave activated heating element45US 4,743,726 A1988
- Hair curling iron and oven43US 4,103,145 A1978
- Heatable flexible hair curlers39US 4,834,118 AClairol Incorporated · 1989
- Hair curling iron31US 5,494,058 AChina Pacific Trade Ltd. · 1996