B61C 7/04
Locomotives or motor railcars with two or more different kinds or types
Official title: Locomotives or motor railcars with two or more different kinds or types of engines, e.g. steam and IC engines
B61C7/04 (Locomotives or motor railcars with two or more different kinds or types) appears on 100 US grants and 127 published applications in this corpus.
Search patents in B61C- Granted patents
- 100
- Published applications
- 127
- Assignees
- 55
- Inventors
- 252
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 4 |
| 2005 | 1 | 2 |
| 2006 | 1 | 7 |
| 2007 | 3 | 1 |
| 2008 | 3 | 8 |
| 2009 | 3 | 2 |
| 2010 | 2 | 7 |
| 2011 | 5 | 1 |
| 2012 | 6 | 2 |
| 2013 | 5 | 7 |
| 2014 | 5 | 11 |
| 2015 | 8 | 5 |
| 2016 | 1 | 5 |
| 2017 | 3 | 4 |
| 2018 | 3 | 9 |
| 2019 | 4 | 7 |
| 2020 | 8 | 10 |
| 2021 | 6 | 5 |
| 2022 | 3 | 7 |
| 2023 | 7 | 6 |
| 2024 | 8 | 5 |
| 2025 | 8 | 3 |
| 2026 | 5 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Insulated feed-through connector8 Sep 2026US 12,728,728 B2Progress Rail Locomotive Inc.
- Locomotive exhaust aftertreatment system28 Jul 2026US 12,692,808 B1Echeneidae Inc.
- Hybrid train energy delivery system14 Jul 2026US 12,679,425 B1AmeTrade, Inc.
- Ammonia cracking for multi-fuel engines17 Feb 2026US 12,552,419 B2Cummins Power Generation Inc.
- Drive control device and drive device for railway vehicle13 Jan 2026US 12,522,256 B2Mitsubishi Electric Corporation
- Hybrid Train Energy Delivery System1 Oct 2026US 2026/0296507 A1AmeTrade, Inc.
- Ammonia cracking for multi-fuel engines4 Jun 2026US 2026/0152212 A1Cummins Power Generation Inc.
- Movable body and maintenance method14 May 2026US 2026/0131766 A1Kawasaki Motors, Ltd.
- Traction system of a hydrogen-electric locomotive and an energy transfer method14 May 2026US 2026/0131830 A1Korea Railroad Research Institute
- Freight train dual power source control system14 May 2026US 2026/0131836 A1Voltify Inc
Most cited
By later US patents
- Emission management for a hybrid locomotive83US 7,349,797 B2Railpower Technologies Corp. · 2008
- Locomotive power train architecture72US 7,304,445 B2Railpower Technologies Corp. · 2007
- Locomotive engine start method57US 7,309,929 B2Railpower Technologies Corp. · 2007
- Multiple engine locomotive configuration40US 7,565,867 B22009
- Multiple prime power source locomotive control38US 7,518,254 B2Railpower Technologies Corp. · 2009