- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F27D - Details or accessories of furnaces, kilns, ovens or retorts, in so far as they are of kinds occurring in more than one kind of furnace
- F27D 21/02 - Observation or illuminating devices
Patent holdings for IPC class F27D 21/02
Total number of patents in this class: 227
10-year publication summary
|
7
|
21
|
21
|
25
|
31
|
21
|
28
|
10
|
13
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| LG Electronics Inc. | 72559 |
12 |
| JFE Steel Corporation | 6794 |
12 |
| Whirlpool Corporation | 4395 |
9 |
| ArcelorMittal | 2248 |
9 |
| BSH Hausgeräte GmbH | 5514 |
8 |
| Samsung Electronics Co., Ltd. | 144426 |
5 |
| Berry Metal Company | 52 |
4 |
| Outotec (Finland) Oy | 480 |
4 |
| POSCO | 2189 |
4 |
| Metso Metals Oy | 197 |
4 |
| Honeywell International Inc. | 13562 |
3 |
| Mitsubishi Heavy Industries, Ltd. | 8657 |
3 |
| Air Products and Chemicals, Inc. | 1404 |
3 |
| Andritz Oy | 282 |
3 |
| Fives Stein | 103 |
3 |
| Haier US Appliance Solutions, Inc. | 3568 |
3 |
| IHI Corporation | 3413 |
3 |
| Ivoclar Vivadent AG | 1049 |
3 |
| Mitsubishi Heavy Industries Environmental & Chemical Engineering Co., Ltd. | 125 |
3 |
| Tata Steel Limited | 175 |
3 |
| Other owners | 126 |