H01F 27/2871
Pancake coils
Official title: {Pancake coils}
H01F27/2871 (Pancake coils) appears on 310 US grants and 408 published applications in this corpus.
Search patents in H01F- Granted patents
- 310
- Published applications
- 408
- Assignees
- 206
- Inventors
- 890
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 6 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 4 |
| 2003 | 2 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 2 |
| 2006 | 4 | 7 |
| 2007 | 2 | 5 |
| 2008 | 3 | 12 |
| 2009 | 1 | 10 |
| 2010 | 4 | 4 |
| 2011 | 9 | 15 |
| 2012 | 15 | 4 |
| 2013 | 6 | 9 |
| 2014 | 6 | 23 |
| 2015 | 8 | 40 |
| 2016 | 14 | 18 |
| 2017 | 20 | 28 |
| 2018 | 26 | 35 |
| 2019 | 22 | 38 |
| 2020 | 33 | 37 |
| 2021 | 22 | 29 |
| 2022 | 25 | 15 |
| 2023 | 19 | 23 |
| 2024 | 20 | 12 |
| 2025 | 13 | 13 |
| 2026 | 16 | 24 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- False notification suppression in wireless power transfer system25 Aug 2026US 12,719,315 B2NuCurrent, Inc.
- Flat coil carrier18 Aug 2026US 12,712,117 B2Mahle International GmbH
- Foreign object detection in a wireless power transfer system18 Aug 2026US 12,712,395 B2Koninklijke Philips N. V.
- Inductance coil with varied geometry23 Jun 2026US 12,665,123 B2Cochlear Limited
- Inductive coil16 Jun 2026US 12,654,574 B2
- Coil component, method for manufacturing coil component, and electronic/electric device24 Sep 2026US 2026/0290676 A1Delta Electronics (Japan), Inc.
- Planar coil array and displacement sensor27 Aug 2026US 2026/0251437 A1Hitachi Astemo, Ltd.
- An integrated inductor27 Aug 2026US 2026/0253783 A1Aalto University Foundation sr
- Coil board and manufacturing method thereof27 Aug 2026US 2026/0253786 A1Zhuhai YUEXIN Semiconductor Limited Liability Company
- Inductor component20 Aug 2026US 2026/0245789 A1Murata Manufacturing Co., Ltd.
Most cited
By later US patents
- Cordless indicia reader with a multifunction coil for wireless charging and EAS deactivation416US 9,478,113 B2Hand Held Products, Inc. · 2016
- Inductive power supply system with multiple coil primary79US 8,338,990 B2Access Business Group International LLC · 2012
- Magnetic core multiple tap or windings devices45US 4,901,048 AWilliamson Windings Inc. · 1990
- High-voltage winding for core-form power transformers44US 4,864,266 AElectric Power Research Institute, Inc. · 1989
- Plank and frame transformer42US 4,864,486 AInternational Business Machines Corporation · 1989