- 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: 379
10-year publication summary
30
|
31
|
40
|
30
|
39
|
29
|
35
|
21
|
23
|
20
|
2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Copeland LP | 702 |
23 |
Mitsubishi Electric Corporation | 46618 |
21 |
Hitachi Industrial Equipment Systems Co., Ltd. | 1467 |
20 |
Atlas Copco Airpower, naamloze vennootschap | 1035 |
18 |
Daikin Industries, Ltd. | 10112 |
16 |
LG Electronics Inc. | 73714 |
14 |
Edwards Limited | 788 |
12 |
Leybold GmbH | 294 |
10 |
Toyota Industries Corporation | 1145 |
9 |
Hanon Systems | 1992 |
8 |
Pfeiffer Vacuum | 167 |
8 |
Bitzer Kuehlmaschinenbau GmbH | 154 |
7 |
Emerson Climate Technologies, Inc. | 301 |
6 |
Trane International Inc. | 1196 |
6 |
Carrier Corporation | 4303 |
5 |
GREE Electric Appliances, Inc. of Zhuhai | 3255 |
5 |
Lennox Industries Inc. | 1131 |
5 |
Sanden Corporation | 964 |
5 |
Samsung Electronics Co., Ltd. | 148077 |
4 |
Agilent Technologies, Inc. | 2630 |
4 |
Other owners | 173 |