- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F24F - Air-conditioning; air-humidification; ventilation; use 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: 376
10-year publication summary
|
10
|
15
|
30
|
40
|
53
|
47
|
50
|
56
|
39
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Qingdao Haier Air Conditioner General Corp.,ltd | 2335 |
33 |
| Haier Smart Home Co., Ltd. | 5299 |
30 |
| Qingdao Haier Air-Conditioning Electronic Co., Ltd. | 1830 |
25 |
| 3m Innovative Properties Company | 17951 |
23 |
| Samsung Electronics Co., Ltd. | 138729 |
15 |
| Mitsubishi Electric Corporation | 44794 |
12 |
| Daikin Industries, Ltd. | 9836 |
11 |
| LG Electronics Inc. | 70957 |
8 |
| Tyco Fire & Security GmbH | 3296 |
7 |
| Integrated Energy Services Corporation | 9 |
5 |
| Versuni Holding B.V. | 895 |
5 |
| Koninklijke Philips N.V. | 23971 |
4 |
| Carrier Corporation | 4449 |
4 |
| Siemens Industry, Inc. | 1429 |
4 |
| Johnson Controls Technology Company | 1480 |
4 |
| American Air Filter Company, Inc. | 178 |
4 |
| FIPAK Research And Development Company | 30 |
4 |
| Google LLC | 40800 |
4 |
| Lennox Industries Inc. | 1099 |
4 |
| Honeywell International Inc. | 14012 |
3 |
| Other owners | 167 |