A45D 4/02
Separate devices designed for heating hair curlers or hair-wavers: for steep curling
Official title: for steep curling, e.g. with means for decreasing the heat (A45D4/14, A45D4/16 take precedence)
A45D4/02 (Separate devices designed for heating hair curlers or hair-wavers: for steep curling) appears on 19 US grants and 17 published applications in this corpus.
Search patents in A45D- Granted patents
- 19
- Published applications
- 17
- Assignees
- 8
- Inventors
- 35
- Latest grant
- 15 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 2 |
| 2014 | 0 | 3 |
| 2015 | 0 | 0 |
| 2016 | 2 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 2 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 3 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Hair curling system15 Jul 2025US 12,357,069 B2Cali-Curl, LLC
- Hair curling system2 Aug 2022US 11,399,610 B2Cali-Curl, LLC
- Hair curling system15 Oct 2019US 10,441,046 B2Cali-Curl, LLC
- Heated hair curler with hinged hair grip and applicator handle6 Sep 2016US 9,433,272 B2
- Hair styling device5 Jan 2016US 9,226,560 B1
- Heating Unit for Rollers Employing Magnetic Inductance6 Nov 2025US 2025/0338937 A1The Original Heatwaeve LLC
- Hair roller5 Jun 2025US 2025/0176693 A1Dyson Technology Limited
- Hair roller22 May 2025US 2025/0160496 A1Dyson Technology Limited
- A multi-functional magnetic clip, hook, and pedal device for crutches, canes and other stick-like objects29 Feb 2024US 2024/0065922 A1
- Hair curling system17 Nov 2022US 2022/0361641 A1Cali-Curl, LLC
Most cited
By later US patents