- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F01C - Rotary-piston or oscillating-piston machines or engines
- F01C 21/04 - Lubrication
Patent holdings for IPC class F01C 21/04
Total number of patents in this class: 143
10-year publication summary
|
9
|
10
|
17
|
7
|
9
|
9
|
1
|
4
|
6
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Panasonic Corporation | 20030 |
12 |
| Pratt & Whitney Canada Corp. | 4838 |
11 |
| Hitachi Industrial Equipment Systems Co., Ltd. | 1466 |
7 |
| LG Electronics Inc. | 73690 |
6 |
| LiquidPiston, Inc. | 49 |
5 |
| Daikin Industries, Ltd. | 10111 |
4 |
| Compound Rotary Engines Limited | 6 |
4 |
| Sanden Corporation | 964 |
4 |
| Atlas Copco Airpower, naamloze vennootschap | 1035 |
3 |
| Orcan Energy AG | 55 |
3 |
| Trane International Inc. | 1195 |
3 |
| Samsung Electronics Co., Ltd. | 147983 |
2 |
| Mitsubishi Electric Corporation | 46590 |
2 |
| Anest Iwata Corporation | 152 |
2 |
| AVL List GmbH | 1304 |
2 |
| Bauer Compressors Inc. | 47 |
2 |
| Bitzer Kuehlmaschinenbau GmbH | 154 |
2 |
| Busch Produktions GmbH | 13 |
2 |
| Eagle Industry Co., Ltd. | 1134 |
2 |
| Emerson Climate Technologies (Suzhou) Co., Ltd. | 170 |
2 |
| Other owners | 63 |