- 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 21/00 - Arrangement of monitoring devicesArrangement of safety devices
Patent holdings for IPC class F27D 21/00
Total number of patents in this class: 721
10-year publication summary
|
65
|
62
|
57
|
52
|
71
|
55
|
53
|
45
|
40
|
30
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6806 |
33 |
| Hatch Ltd. | 213 |
21 |
| ArcelorMittal | 2254 |
20 |
| Danieli & C. Officine Meccaniche S.p.A. | 713 |
13 |
| Primetals Technologies Austria GmbH | 529 |
13 |
| SMS Group GmbH | 1117 |
13 |
| Ivoclar Vivadent AG | 1048 |
12 |
| Paul Wurth S.A. | 417 |
12 |
| Outotec (Finland) Oy | 480 |
11 |
| PaneraTech, Inc. | 33 |
11 |
| POSCO | 2188 |
11 |
| Refractory Intellectual Property GmbH & Co. KG | 535 |
11 |
| Siemens AG | 24552 |
10 |
| Applied Materials, Inc. | 18475 |
10 |
| SMS Siemag Aktiengesellschaft | 506 |
10 |
| Tokyo Electron Limited | 12599 |
9 |
| Air Products and Chemicals, Inc. | 1414 |
9 |
| Metso Metals Oy | 199 |
9 |
| Novelis Inc. | 739 |
8 |
| Saint-Gobain Centre de Recherches et d'Etudes Europeen | 491 |
8 |
| Other owners | 467 |