- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- 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 devices; Arrangements of safety devices
Patent holdings for IPC class F27D 21/00
Total number of patents in this class: 680
10-year publication summary
|
65
|
65
|
62
|
57
|
52
|
71
|
54
|
51
|
41
|
12
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hatch Ltd. | 219 |
27 |
| JFE Steel Corporation | 6067 |
25 |
| ArcelorMittal | 1887 |
17 |
| Ivoclar Vivadent AG | 1060 |
12 |
| Paul Wurth S.A. | 392 |
12 |
| Primetals Technologies Austria GmbH | 479 |
12 |
| Refractory Intellectual Property GmbH & Co. KG | 502 |
12 |
| SMS Group GmbH | 1029 |
12 |
| Outotec (Finland) Oy | 491 |
11 |
| POSCO | 2222 |
11 |
| Siemens AG | 24990 |
10 |
| Danieli & C. Officine Meccaniche S.p.A. | 680 |
10 |
| SMS Siemag Aktiengesellschaft | 529 |
10 |
| Applied Materials, Inc. | 16587 |
9 |
| Tokyo Electron Limited | 11599 |
9 |
| Air Products and Chemicals, Inc. | 1448 |
9 |
| PaneraTech, Inc. | 31 |
9 |
| Tenova Goodfellow Inc. | 44 |
8 |
| Metso Metals Oy | 205 |
8 |
| Corning Incorporated | 9932 |
7 |
| Other owners | 440 |