- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F24F - Air-conditioningair-humidificationventilationuse of air currents for screening
- F24F 11/39 - Monitoring filter performance
Patent holdings for IPC class F24F 11/39
Total number of patents in this class: 420
10-year publication summary
|
15
|
30
|
40
|
53
|
48
|
51
|
58
|
41
|
27
|
21
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Qingdao Haier Air Conditioner General Corp.,ltd | 2435 |
33 |
| Haier Smart Home Co., Ltd. | 5752 |
30 |
| Qingdao Haier Air-Conditioning Electronic Co., Ltd. | 1928 |
25 |
| 3m Innovative Properties Company | 17450 |
24 |
| Samsung Electronics Co., Ltd. | 159298 |
19 |
| Mitsubishi Electric Corporation | 48409 |
13 |
| K&N Engineering, Inc. | 463 |
12 |
| Daikin Industries, Ltd. | 10527 |
11 |
| Tyco Fire & Security GmbH | 3683 |
11 |
| LG Electronics Inc. | 76219 |
10 |
| FIPAK Research And Development Company | 34 |
5 |
| Lennox Industries Inc. | 1128 |
5 |
| Integrated Energy Services Corporation | 9 |
5 |
| Versuni Holding B.V. | 1008 |
5 |
| Koninklijke Philips N.V. | 26073 |
4 |
| Carrier Corporation | 3962 |
4 |
| Siemens Industry, Inc. | 1594 |
4 |
| Johnson Controls Technology Company | 1373 |
4 |
| American Air Filter Company, Inc. | 196 |
4 |
| Google LLC | 44850 |
4 |
| Other owners | 188 |