- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F01B - Machines or engines, in general or of positive-displacement type, e.g. steam engines
- F01B 31/14 - Changing of compression ratio
Patent holdings for IPC class F01B 31/14
Total number of patents in this class: 25
10-year publication summary
|
3
|
0
|
7
|
6
|
2
|
0
|
2
|
0
|
1
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Honda Motor Co., Ltd. | 25784 |
4 |
| AVL List GmbH | 1318 |
2 |
| IHI Corporation | 3471 |
2 |
| Halliburton Energy Services, Inc. | 21090 |
1 |
| Toyota Motor Corporation | 33519 |
1 |
| Ford Global Technologies, LLC | 20949 |
1 |
| Danfoss Power Solutions Inc. | 111 |
1 |
| Flexibility Engineering, LLC | 5 |
1 |
| Graco Minnesota Inc. | 1231 |
1 |
| Hydro-Gear Limited Partnership | 342 |
1 |
| iwis motorsysteme GmbH & Co. KG | 120 |
1 |
| Micropump, Inc. | 23 |
1 |
| Peugeot Citroen Automobiles SA | 1729 |
1 |
| Scalzo Automotive Research Pty Ltd | 5 |
1 |
| Tonand Brakes Inc. | 4 |
1 |
| Volvo Truck Corporation | 3582 |
1 |
| ECO Holding 1 GmbH | 126 |
1 |
| Hedman Ericsson Patent AB | 15 |
1 |
| Hieff Engine Company Limited | 3 |
1 |
| Hitachi Astemo, Ltd. | 6372 |
1 |
| Other owners | 0 |