- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F04C - Rotary-piston, or oscillating-piston, positive-displacement machines for liquids; rotary-piston, or oscillating-piston, positive-displacement pumps
- F04C 28/28 - Safety arrangements; Monitoring
Patent holdings for IPC class F04C 28/28
Total number of patents in this class: 362
10-year publication summary
|
31
|
34
|
41
|
31
|
40
|
29
|
36
|
21
|
22
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Copeland LP | 674 |
23 |
| Mitsubishi Electric Corporation | 44738 |
20 |
| Hitachi Industrial Equipment Systems Co., Ltd. | 1402 |
18 |
| Daikin Industries, Ltd. | 9810 |
16 |
| Atlas Copco Airpower, naamloze vennootschap | 982 |
16 |
| Edwards Limited | 799 |
13 |
| LG Electronics Inc. | 70898 |
10 |
| Leybold GmbH | 298 |
10 |
| Toyota Industries Corporation | 1054 |
9 |
| Hanon Systems | 1814 |
8 |
| Pfeiffer Vacuum | 166 |
7 |
| Emerson Climate Technologies, Inc. | 307 |
6 |
| Trane International Inc. | 1149 |
6 |
| Carrier Corporation | 4444 |
5 |
| Bitzer Kuehlmaschinenbau GmbH | 146 |
5 |
| GREE Electric Appliances, Inc. of Zhuhai | 3149 |
5 |
| Lennox Industries Inc. | 1098 |
5 |
| Sanden Corporation | 920 |
5 |
| Agilent Technologies, Inc. | 2680 |
4 |
| Oerlikon Leybold Vacuum GmbH | 112 |
4 |
| Other owners | 167 |