- All sections
- B - Performing operationstransporting
- B61D - Body details or kinds of railway vehicles
- B61D 27/00 - Heating, cooling, ventilating, or air-conditioning
Patent holdings for IPC class B61D 27/00
Total number of patents in this class: 535
10-year publication summary
|
37
|
40
|
50
|
52
|
46
|
47
|
52
|
42
|
33
|
29
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Electric Corporation | 46093 |
80 |
| Siemens Mobility GmbH | 1720 |
61 |
| Siemens AG | 24484 |
47 |
| Hitachi, Ltd. | 15484 |
23 |
| Bombardier Transportation GmbH | 646 |
21 |
| CRRC Qingdao Sifang Co., Ltd. | 382 |
18 |
| CRRC Changchun Railway Vehicles Co., Ltd. | 248 |
16 |
| Alstom Holdings | 612 |
14 |
| Kawasaki Jukogyo Kabushiki Kaisha (trading as Kawasaki Heavy Industries, Ltd.) | 3102 |
12 |
| CRRC Zhuzhou Locomotive Co., Ltd | 258 |
11 |
| Kawasaki Railcar Manufacturing Co., Ltd. | 180 |
11 |
| CRRC Tangshan Co., Ltd. | 257 |
10 |
| Faiveley Transport Leipzig GmbH & Co KG | 11 |
8 |
| Hamilton Sundstrand Corporation | 4868 |
7 |
| Knorr-Bremse España, S.A. | 12 |
7 |
| Liebherr-Aerospace Toulouse SAS | 147 |
6 |
| MAHLE International GmbH | 2770 |
6 |
| Siemens AG Österreich | 317 |
5 |
| Trinity Rail Group, LLC | 111 |
5 |
| Ford Global Technologies, LLC | 20570 |
4 |
| Other owners | 163 |