- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F01C - Rotary-piston or oscillating-piston machines or engines
- F01C 21/08 - Rotary pistons
Patent holdings for IPC class F01C 21/08
Total number of patents in this class: 532
10-year publication summary
|
69
|
66
|
82
|
65
|
39
|
54
|
43
|
33
|
13
|
3
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| LG Electronics Inc. | 69257 |
40 |
| Pratt & Whitney Canada Corp. | 4215 |
35 |
| Hitachi Astemo, Ltd. | 5618 |
13 |
| Pierburg Pump Technology GmbH | 305 |
10 |
| Joma-Polytec GmbH | 45 |
9 |
| Robert Bosch GmbH | 40953 |
8 |
| Mitsubishi Electric Corporation | 43934 |
8 |
| LiquidPiston, Inc. | 41 |
8 |
| Rotoliptic Technologies Incorporated | 19 |
8 |
| Lumenium LLC | 17 |
7 |
| Exponential Technologies, Inc. | 37 |
6 |
| Fibonacci International, Inc. | 10 |
6 |
| Fujitsu General Limited | 541 |
6 |
| Joma-hydromechanic GmbH | 25 |
6 |
| KYB Corporation | 1278 |
6 |
| Vhit S.p.A. | 64 |
6 |
| FeTu Limited | 17 |
6 |
| Danfoss A/S | 1259 |
6 |
| GREE Green Refrigeration Technology Center Co., Ltd. of Zhuhai | 155 |
5 |
| Greystone Technologies Pty Ltd | 10 |
5 |
| Other owners | 328 |