H02K 23/58
Motors or generators without iron cores
Official title: Motors or generators without iron cores
H02K23/58 (Motors or generators without iron cores) appears on 36 US grants and 26 published applications in this corpus.
Search patents in H02K- Granted patents
- 36
- Published applications
- 26
- Assignees
- 33
- Inventors
- 77
- Latest grant
- 12 Nov 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 3 |
| 2002 | 3 | 2 |
| 2003 | 5 | 1 |
| 2004 | 2 | 2 |
| 2005 | 2 | 2 |
| 2006 | 2 | 2 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 2 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 1 | 1 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 2 |
| 2020 | 1 | 0 |
| 2021 | 2 | 1 |
| 2022 | 0 | 1 |
| 2023 | 0 | 1 |
| 2024 | 2 | 1 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Brush-commutated DC electric motor with an improved oscillation behavior12 Nov 2024US 12,142,974 B2Maxon International AG
- Transmission structure of coreless tubular motor16 Jan 2024US 11,873,882 B2Hangzhou Wistar Mechanical & Electric Technology Co., Ltd
- Coreless electric machine with magnet coils having trapezoidal shape and angle less than 90 degrees with circumferentially aligned legs13 Jul 2021US 11,063,486 B2
- Motor coil substrate13 Apr 2021US 10,978,926 B2Ibiden Co., Ltd.
- Two-pole brush-commutated DC electric motor3 Nov 2020US 10,826,359 B2Lakeview Innovation Ltd.
- Coreless motor30 Jul 2026US 2026/0221832 A1Citizen Micro Co., Ltd.
- Electromagnetic motor for operation in a high magnetic field environment21 Mar 2024US 2024/0097532 A1University of Utah Research Foundation
- Brush-commutated dc electric motor with an improved oscillation behavior19 Jan 2023US 2023/0013171 A1Maxon International AG
- Transmission structure of coreless tubular motor28 Jul 2022US 2022/0235848 A1Hangzhou Wistar Mechanical & Electric Technology Co., Ltd
- Ironless electric motor for mri compatibility19 Aug 2021US 2021/0252213 A1Koninklijke Philips N. V.
Most cited
By later US patents
- Electric motor or alternator61US 4,924,125 AClark Automotive Developments Limited · 1990
- Device having a mounting structure for holding a vibrator46US 5,943,214 AMatsushita Electric Industrial Co., Ltd. · 1999
- Efficient motor30US 7,081,698 B1Black & Decker Inc. · 2006
- High efficiency electro-mechanical energy conversion device21US 6,013,963 AEMEC Energy, L.L.C. · 2000
- Sleeve type of coreless motor with reduced starting current19US 5,847,484 AMatsushita Electric Industrial Co., Ltd. · 1998