Method and system for multi-fuel engine
US-2023415791-A1 · Dec 28, 2023 · US
Locomotives or motor railcars with two or more different kinds or types of engines, e.g. steam and IC engines
Locomotives or motor railcars with two or more different kinds or types of engines, e.g. steam and IC engines · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B61C7/04 |
| Official title | Locomotives or motor railcars with two or more different kinds or types of engines, e.g. steam and IC engines |
| Display label | Locomotives or motor railcars with two or more different kinds or types of engines, e.g. steam and IC engines |
| Total patents | 87 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 3 |
| 2017 | 5 |
| 2018 | 8 |
| 2019 | 6 |
| 2020 | 12 |
| 2021 | 7 |
| 2022 | 6 |
| 2023 | 9 |
| 2024 | 9 |
| 2025 | 12 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Arrangement for driving a locomotive having various energy-provision systems
US-2023234620-A1 · Jul 27, 2023 · US
Arrangement for driving a locomotive having various energy-provision systems
US-2023234622-A1 · Jul 27, 2023 · US
Railway vehicle with antifreezing device, and related method
US-11702116-B2 · Jul 18, 2023 · US
Energy management for multi-input propulsion
US-2023202347-A1 · Jun 29, 2023 · US
Control system and method for a vehicle system
US-2023173947-A1 · Jun 8, 2023 · US
Power management system for a consist
US-11584407-B2 · Feb 21, 2023 · US
Vehicle control system and method
US-2022402399-A1 · Dec 22, 2022 · US
Drive control device and drive device for railway vehicle
US-2022177011-A1 · Jun 9, 2022 · US
Hybrid propulsion system and method of controlling same
US-2022153252-A1 · May 19, 2022 · US
Cooling system and method for a dual-powered railroad vehicle
US-11267490-B2 · Mar 8, 2022 · US
Hybrid propulsion system and method of controlling same
US-2022055605-A1 · Feb 24, 2022 · US
Arrangement for driving a locomotive having various energy-provision systems
US-2022048540-A1 · Feb 17, 2022 · US
Hybrid propulsion system and method of controlling same
US-11192458-B2 · Dec 7, 2021 · US
Control System And Method For A Vehicle System
US-2021197873-A1 · Jul 1, 2021 · US
Power management system for a consist
US-2021053594-A1 · Feb 25, 2021 · US
Method and systems for an auxiliary power unit
US-10919412-B2 · Feb 16, 2021 · US
Railroad vehicle control device
US-10913365-B2 · Feb 9, 2021 · US
Control system and method for a vehicle system
US-2021031817-A1 · Feb 4, 2021 · US
Device and method for converting a diesel-electric locomotive into an electric locomotive
US-2021016806-A1 · Jan 21, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B61C7/04?
- CPC B61C7/04 is the Cooperative Patent Classification code for “Locomotives or motor railcars with two or more different kinds or types of engines, e.g. steam and IC engines.”
- How many patents are filed under CPC B61C7/04 (Locomotives or motor railcars with two or more different kinds or types of engines, e.g. steam and IC engines)?
- Our database includes 87 publications tagged with this CPC code.
- Is patent activity under CPC B61C7/04 growing?
- Publication counts under this code: 9 in 2024 vs 12 in 2025 (latest complete years).