H01F 27/28
Coils
Official title: Coils; Windings; Conductive connections
H01F27/28 (Coils) appears on 10,485 US grants and 13,373 published applications in this corpus.
Search patents in H01F- Granted patents
- 10,485
- Published applications
- 13,373
- Assignees
- 2,796
- Inventors
- 18,049
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 27 | 0 |
| 1977 | 25 | 0 |
| 1978 | 28 | 0 |
| 1979 | 26 | 0 |
| 1980 | 26 | 0 |
| 1981 | 27 | 0 |
| 1982 | 35 | 0 |
| 1983 | 20 | 0 |
| 1984 | 30 | 0 |
| 1985 | 48 | 0 |
| 1986 | 30 | 0 |
| 1987 | 39 | 0 |
| 1988 | 31 | 0 |
| 1989 | 44 | 0 |
| 1990 | 33 | 0 |
| 1991 | 26 | 0 |
| 1992 | 24 | 0 |
| 1993 | 31 | 0 |
| 1994 | 41 | 0 |
| 1995 | 31 | 0 |
| 1996 | 34 | 0 |
| 1997 | 34 | 0 |
| 1998 | 52 | 0 |
| 1999 | 65 | 0 |
| 2000 | 80 | 0 |
| 2001 | 103 | 33 |
| 2002 | 90 | 158 |
| 2003 | 127 | 125 |
| 2004 | 111 | 172 |
| 2005 | 128 | 142 |
| 2006 | 145 | 162 |
| 2007 | 127 | 184 |
| 2008 | 125 | 210 |
| 2009 | 109 | 216 |
| 2010 | 164 | 244 |
| 2011 | 196 | 240 |
| 2012 | 177 | 249 |
| 2013 | 177 | 345 |
| 2014 | 243 | 490 |
| 2015 | 259 | 607 |
| 2016 | 380 | 671 |
| 2017 | 486 | 809 |
| 2018 | 572 | 959 |
| 2019 | 735 | 1092 |
| 2020 | 745 | 1042 |
| 2021 | 721 | 994 |
| 2022 | 809 | 944 |
| 2023 | 825 | 879 |
| 2024 | 819 | 947 |
| 2025 | 719 | 830 |
| 2026 | 506 | 629 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Coil component and IC card having the same6 Oct 2026US 12,755,129 B2TDK Corporation
- Core piece, reactor, converter, and power conversion device6 Oct 2026US 12,755,888 B2Autonetworks Technologies, Ltd.
- Method for reducing electrical consumption using magnetic transformer devices6 Oct 2026US 12,755,889 B2Harmonify AB
- Electro-magnetic coil with coolant permeability6 Oct 2026US 12,755,890 B2Magnebotix AG
- Laminated electronic component6 Oct 2026US 12,755,891 B2TDK Corporation
- Magnetic composition, magnetic film, stack, and circuit member8 Oct 2026US 2026/0311918 A1
- Electronic device8 Oct 2026US 2026/0311925 A1Denso Corporation
- Coil substrate, motor coil substrate, and motor8 Oct 2026US 2026/0311926 A1Ibiden Co., Ltd.
- Coil component8 Oct 2026US 2026/0311927 A1Murata Manufacturing Co., Ltd.
- Electronic component8 Oct 2026US 2026/0311928 A1TDK Corporation
Most cited
By later US patents
- Surgical system instrument sterile adapter1,479US 9,096,033 B2Intuitive Surgical Operations, Inc. · 2015
- System and method for inductive charging of portable devices499US 8,169,185 B2Mojo Mobility, Inc. · 2012
- Contact-less power transfer495US 6,906,495 B2Splashpower Limited · 2005
- Surgical system sterile drape473US 8,746,252 B2Intuitive Surgical Operations, Inc. · 2014
- Contact-less power transfer438US 7,525,283 B2Access Business Group International LLC · 2009