- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F27B - Furnaces, kilns, ovens or retorts in generalopen sintering or like apparatus
- F27B 3/20 - Arrangements of heating devices
Patent holdings for IPC class F27B 3/20
Total number of patents in this class: 166
10-year publication summary
|
11
|
9
|
10
|
15
|
12
|
11
|
7
|
5
|
17
|
10
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Tounetsu Co., Ltd. | 28 |
8 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3983 |
7 |
| Primetals Technologies Austria GmbH | 536 |
5 |
| Corning Incorporated | 10284 |
4 |
| SMS Group GmbH | 1126 |
4 |
| Siemens AG | 24437 |
3 |
| Asahi Glass Company, Limited | 2771 |
3 |
| Knauf Insulation | 50 |
3 |
| Nippon Crucible Co., Ltd. | 38 |
3 |
| Osaka Gas Co., Ltd. | 312 |
3 |
| Saint-Gobain Isover | 634 |
3 |
| Systems Spray Cooled, Inc. | 52 |
3 |
| Miwenti S.r.l. | 6 |
3 |
| Sacmi Forni & Filter S.p.A. | 11 |
3 |
| Eestech Europe Holdings BV | 8 |
3 |
| Metso Metals Oy | 207 |
3 |
| Air Products and Chemicals, Inc. | 1443 |
2 |
| Daiwa Steel Tube Industries Co., Ltd. | 11 |
2 |
| Glassflake Limited | 19 |
2 |
| Inductotherm Corp. | 159 |
2 |
| Other owners | 97 |