- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F23L - Supplying air or non-combustible liquids or gases to combustion apparatus in general; valves or dampers specially adapted for controlling air supply or draught in combustion apparatus; inducing draught in combustion apparatus; tops for chimneys or ventilating shafts; terminals 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: 175
10-year publication summary
|
11
|
16
|
10
|
8
|
6
|
9
|
9
|
10
|
11
|
2
|
| 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 | 3599 |
8 |
| IHI Corporation | 3359 |
6 |
| Chugai Ro Co., Ltd. | 123 |
5 |
| General Electric Technology GmbH | 1599 |
5 |
| Kyungdong Navien Co., Ltd. | 594 |
5 |
| Mitsubishi Heavy Industries, Ltd. | 8538 |
4 |
| United States Stove Company | 56 |
4 |
| JFE Steel Corporation | 6557 |
3 |
| Mitsubishi Hitachi Power Systems, Ltd. | 995 |
3 |
| Miura Co., Ltd. | 290 |
3 |
| Mitsubishi Power, Ltd. | 1737 |
3 |
| Shell Internationale Research Maatschappij B.V. | 3722 |
2 |
| Toyota Motor Corporation | 30455 |
2 |
| Hitachi, Ltd. | 15226 |
2 |
| Kawasaki Heavy Industries, Limited | 1590 |
2 |
| Coolbrook Oy | 60 |
2 |
| Frost Fighter Inc. | 9 |
2 |
| Huaneng Clean Energy Research Institute | 371 |
2 |
| Linde Aktiengesellschaft | 1549 |
2 |
| Osaka Gas Co., Ltd. | 320 |
2 |
| Other owners | 108 |