B60L 9/28
Polyphase motors
Official title: polyphase motors
B60L9/28 (Polyphase motors) appears on 64 US grants and 69 published applications in this corpus.
Search patents in B60L- Granted patents
- 64
- Published applications
- 69
- Assignees
- 28
- Inventors
- 129
- Latest grant
- 18 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 2 |
| 2010 | 0 | 3 |
| 2011 | 1 | 5 |
| 2012 | 1 | 5 |
| 2013 | 3 | 4 |
| 2014 | 7 | 11 |
| 2015 | 6 | 8 |
| 2016 | 6 | 5 |
| 2017 | 6 | 7 |
| 2018 | 8 | 4 |
| 2019 | 7 | 5 |
| 2020 | 3 | 3 |
| 2021 | 2 | 0 |
| 2022 | 2 | 1 |
| 2023 | 0 | 2 |
| 2024 | 2 | 2 |
| 2025 | 2 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electric traction system18 Nov 2025US 12,476,570 B2Crrc Zhuzhou Institute Co., Ltd.
- Apparatus and method for rapid charging using shared power electronics12 Aug 2025US 12,384,260 B2Edison Innovations, LLC
- Arrangement and method for carrying out a self-load test on a rail vehicle10 Dec 2024US 12,163,862 B2Siemens Mobility GmbH
- Apparatus and method for rapid charging using shared power electronics30 Jan 2024US 11,884,168 B2General Electric Company
- Integrated motor-gear box wheel hub drive30 Aug 2022US 11,427,228 B2Bombardier Transportation GmbH
- Electric traction system19 Feb 2026US 2026/0051836 A1Crrc Zhuzhou Institute Co., Ltd.
- Electric traction system23 May 2024US 2024/0171108 A1Crrc Zhuzhou Institute Co., Ltd.
- Apparatus and method for rapid charging using shared power electronics16 May 2024US 2024/0157821 A1General Electric Company
- Arrangement and method for carrying out a self-load test on a rail vehicle15 Jun 2023US 2023/0184632 A1Siemens Mobility GmbH
- Apparatus and method for rapid charging using shared power electronics16 Feb 2023US 2023/0049722 A1General Electric Company
Most cited
By later US patents
- Free wheel diode arrangement for neutral point clamped electric power conversion apparatus39US 5,638,266 AHitachi, Ltd. · 1997
- Apparatus and method for rapid charging using shared power electronics32US 8,698,451 B2General Electric Company · 2014
- Power conversion apparatus28US 5,742,493 AHitachi, Ltd. · 1998
- Apparatus for driving electric car by inverter-controlled motor through gear mechanism20US 6,431,297 B1Kabushiki Kaisha Toshiba · 2002
- Module of a circuit arrangement which is preferably contained in a drive for a railroad vehicle and is of modular construction19US 6,163,457 ADaimlerChrysler AG · 2000