- 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: 250
10-year publication summary
|
21
|
21
|
25
|
31
|
21
|
29
|
10
|
16
|
16
|
14
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| LG Electronics Inc. | 75694 |
14 |
| JFE Steel Corporation | 7527 |
12 |
| ArcelorMittal | 2672 |
11 |
| Whirlpool Corporation | 4643 |
10 |
| BSH Hausgeräte GmbH | 5624 |
8 |
| Samsung Electronics Co., Ltd. | 157719 |
5 |
| Honeywell International Inc. | 12778 |
4 |
| Air Products and Chemicals, Inc. | 1471 |
4 |
| Berry Metal Company | 50 |
4 |
| Ivoclar Vivadent AG | 1047 |
4 |
| Outotec (Finland) Oy | 455 |
4 |
| POSCO | 2143 |
4 |
| Metso Metals Oy | 224 |
4 |
| Mitsubishi Heavy Industries, Ltd. | 9128 |
3 |
| Andritz Oy | 294 |
3 |
| Danieli Automation SpA | 128 |
3 |
| Danieli & C. Officine Meccaniche S.p.A. | 720 |
3 |
| Fives Stein | 108 |
3 |
| Haier US Appliance Solutions, Inc. | 4033 |
3 |
| IHI Corporation | 3535 |
3 |
| Other owners | 141 |