- 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: 234
10-year publication summary
|
7
|
19
|
18
|
25
|
28
|
19
|
27
|
10
|
13
|
14
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| LG Electronics Inc. | 73383 |
12 |
| JFE Steel Corporation | 6860 |
12 |
| Whirlpool Corporation | 4436 |
9 |
| ArcelorMittal | 2300 |
9 |
| BSH Hausgeräte GmbH | 5530 |
8 |
| Samsung Electronics Co., Ltd. | 147003 |
5 |
| Berry Metal Company | 52 |
4 |
| Ivoclar Vivadent AG | 1055 |
4 |
| Outotec (Finland) Oy | 480 |
4 |
| POSCO | 2184 |
4 |
| Metso Metals Oy | 207 |
4 |
| Honeywell International Inc. | 13548 |
3 |
| Mitsubishi Heavy Industries, Ltd. | 8764 |
3 |
| Air Products and Chemicals, Inc. | 1443 |
3 |
| Andritz Oy | 284 |
3 |
| Danieli Automation SpA | 121 |
3 |
| Danieli & C. Officine Meccaniche S.p.A. | 718 |
3 |
| Fives Stein | 105 |
3 |
| Haier US Appliance Solutions, Inc. | 3661 |
3 |
| IHI Corporation | 3449 |
3 |
| Other owners | 132 |