- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F24F - Air-conditioning; air-humidification; ventilation; use of air currents for screening
- F24F 11/77 - Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
Patent holdings for IPC class F24F 11/77
Total number of patents in this class: 1205
10-year publication summary
|
13
|
36
|
70
|
76
|
99
|
133
|
156
|
158
|
169
|
45
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Qingdao Haier Air Conditioner General Corp.,ltd | 2228 |
145 |
| Haier Smart Home Co., Ltd. | 4882 |
141 |
| Qingdao Haier Air-Conditioning Electronic Co., Ltd. | 1721 |
105 |
| Mitsubishi Electric Corporation | 43934 |
56 |
| Daikin Industries, Ltd. | 9495 |
56 |
| GD Midea Air-Conditioning Equipment Co., Ltd. | 1475 |
46 |
| Lennox Industries Inc. | 1088 |
38 |
| Samsung Electronics Co., Ltd. | 131630 |
35 |
| Panasonic Intellectual Property Management Co., Ltd. | 27812 |
32 |
| Midea Group Co., Ltd. | 4025 |
31 |
| Johnson Controls Tyco IP Holdings LLP | 1584 |
23 |
| LG Electronics Inc. | 69257 |
20 |
| Carrier Corporation | 4759 |
19 |
| Delta T, LLC | 272 |
17 |
| GREE Electric Appliances, Inc. of Zhuhai | 3007 |
15 |
| Tyco Fire & Security GmbH | 2172 |
15 |
| Siemens Industry, Inc. | 1417 |
14 |
| Trane International Inc. | 1123 |
13 |
| Johnson Controls Technology Company | 1522 |
11 |
| Regal Beloit America, Inc. | 939 |
11 |
| Other owners | 362 |