- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F23L - Supplying air or non-combustible liquids or gases to combustion apparatus in generalvalves or dampers specially adapted for controlling air supply or draught in combustion apparatusinducing draught in combustion apparatustops for chimneys or ventilating shaftsterminals for flues
- F23L 15/00 - Heating of air supplied for combustion
Patent holdings for IPC class F23L 15/00
Total number of patents in this class: 174
10-year publication summary
|
11
|
16
|
10
|
8
|
6
|
9
|
9
|
10
|
11
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3932 |
8 |
| IHI Corporation | 3408 |
7 |
| Chugai Ro Co., Ltd. | 126 |
5 |
| Kyungdong Navien Co., Ltd. | 603 |
5 |
| Mitsubishi Heavy Industries, Ltd. | 8647 |
4 |
| United States Stove Company | 59 |
4 |
| General Electric Technology GmbH | 1456 |
3 |
| JFE Steel Corporation | 6767 |
3 |
| Mitsubishi Hitachi Power Systems, Ltd. | 993 |
3 |
| Miura Co., Ltd. | 286 |
3 |
| Mitsubishi Power, Ltd. | 1757 |
3 |
| Hitachi, Ltd. | 15434 |
2 |
| Kawasaki Heavy Industries, Limited | 1616 |
2 |
| Coolbrook Oy | 67 |
2 |
| Frost Fighter Inc. | 8 |
2 |
| Huaneng Clean Energy Research Institute | 420 |
2 |
| Linde Aktiengesellschaft | 1522 |
2 |
| Osaka Gas Co., Ltd. | 313 |
2 |
| Praxair Technology, Inc. | 1311 |
2 |
| Sumitomo Heavy Industries, Ltd. | 1875 |
2 |
| Other owners | 108 |