H02K 3/40
For high voltage
Official title: for high voltage, e.g. affording protection against corona discharges
H02K3/40 (For high voltage) appears on 236 US grants and 249 published applications in this corpus.
Search patents in H02K- Granted patents
- 236
- Published applications
- 249
- Assignees
- 114
- Inventors
- 585
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 4 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 8 | 0 |
| 1999 | 6 | 0 |
| 2000 | 7 | 0 |
| 2001 | 7 | 3 |
| 2002 | 7 | 17 |
| 2003 | 6 | 9 |
| 2004 | 11 | 6 |
| 2005 | 11 | 7 |
| 2006 | 6 | 5 |
| 2007 | 0 | 7 |
| 2008 | 4 | 7 |
| 2009 | 2 | 3 |
| 2010 | 3 | 9 |
| 2011 | 7 | 7 |
| 2012 | 5 | 5 |
| 2013 | 3 | 5 |
| 2014 | 4 | 12 |
| 2015 | 4 | 19 |
| 2016 | 5 | 8 |
| 2017 | 5 | 10 |
| 2018 | 5 | 17 |
| 2019 | 11 | 17 |
| 2020 | 16 | 20 |
| 2021 | 13 | 13 |
| 2022 | 11 | 15 |
| 2023 | 8 | 6 |
| 2024 | 12 | 12 |
| 2025 | 10 | 7 |
| 2026 | 5 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electrical operating means having an insulation system, and method for producing the insulation system28 Apr 2026US 12,614,943 B2Siemens Aktiengesellschaft
- Stator of rotating electric machine21 Apr 2026US 12,609,572 B2LG Electronics Inc.
- Electric insulation material and/or impregnation resin for a wrapping tape insulation for a medium- and/or high-voltage machine14 Apr 2026US 12,600,814 B2Innomotics GmbH
- Powder coating formulation for an insulation system of an electric machine17 Mar 2026US 12,580,437 B2Innomotics GmbH
- Stress control coating for high voltage conductor insulation13 Jan 2026US 12,525,837 B1
- Asymmetric wire insulation for traction motor stators27 Aug 2026US 2026/0254304 A1Ford Global Technologies, LLC
- Stator, and motor comprising same9 Jul 2026US 2026/0196900 A1LG Magna E-Powertrain Co., Ltd.
- Stator end turn protection from partial discharge events in electrical submersible pump (esp) motors4 Jun 2026US 2026/0155695 A1Halliburton Energy Services.Inc.
- Enamelled wire4 Dec 2025US 2025/0372278 A1ABB Schweiz AG
- Electric machine and method for electrically insulating portions of an electric machine27 Nov 2025US 2025/0364860 A1GE Aviation Systems LLC
Most cited
By later US patents
- Turbo generator plant with a high voltage electric generator89US 6,936,947 B1ABB AB · 2005
- Grounding of outer winding insulation to cores in dynamoelectric machines87US 4,001,616 ACanadian General Electric Company Limited · 1977
- Bar windings for electrical machines81US 4,308,476 ABBC Brown, Boveri & Company, Limited · 1981
- Method and device for controlling the magnetic flux in a rotating high voltage electric alternating current machine81US 6,525,504 B1ABB AB · 2003
- Conductor bar for electric machines and method of manufacture thereof64US 4,403,163 ABrown, Boveri & Cie AG · 1983