- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F04C - Rotary-piston, or oscillating-piston, positive-displacement machines for liquidsrotary-piston, or oscillating-piston, positive-displacement pumps
- F04C 28/28 - Safety arrangementsMonitoring
Patent holdings for IPC class F04C 28/28
Total number of patents in this class: 394
10-year publication summary
|
34
|
41
|
31
|
40
|
29
|
36
|
21
|
22
|
28
|
12
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Copeland LP | 700 |
23 |
| Mitsubishi Electric Corporation | 48018 |
21 |
| Atlas Copco Airpower, naamloze vennootschap | 1081 |
20 |
| Hitachi Industrial Equipment Systems Co., Ltd. | 1541 |
20 |
| Daikin Industries, Ltd. | 10499 |
16 |
| LG Electronics Inc. | 75694 |
15 |
| Edwards Limited | 774 |
12 |
| Hanon Systems | 2106 |
11 |
| Leybold GmbH | 298 |
11 |
| Toyota Industries Corporation | 1209 |
10 |
| Pfeiffer Vacuum | 184 |
8 |
| Bitzer Kuehlmaschinenbau GmbH | 158 |
7 |
| Agilent Technologies, Inc. | 2634 |
6 |
| Emerson Climate Technologies, Inc. | 293 |
6 |
| Trane International Inc. | 1228 |
6 |
| Carrier Corporation | 3955 |
5 |
| Ebara Corporation | 2323 |
5 |
| GREE Electric Appliances, Inc. of Zhuhai | 3316 |
5 |
| Lennox Industries Inc. | 1105 |
5 |
| Sanden Corporation | 1030 |
5 |
| Other owners | 177 |