- 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 7/04 - Circulating atmospheres by mechanical means
Patent holdings for IPC class F27D 7/04
Total number of patents in this class: 159
10-year publication summary
|
12
|
12
|
15
|
6
|
16
|
10
|
8
|
10
|
2
|
8
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6849 |
9 |
| Illinois Tool Works Inc. | 11478 |
8 |
| Quintus Technologies AB | 66 |
8 |
| Corning Incorporated | 10275 |
6 |
| IHI Corporation | 3450 |
6 |
| IHI Machinery and Furnace Co., Ltd. | 79 |
6 |
| Ebner Industrieofenbau GmbH | 141 |
5 |
| ECM Technologies | 29 |
5 |
| Primetals Technologies Austria GmbH | 536 |
4 |
| Pan Pacific Copper Co., Ltd. | 31 |
3 |
| POSCO | 2186 |
3 |
| The Boeing Company | 20084 |
2 |
| Tokyo Electron Limited | 12762 |
2 |
| Mitsubishi Chemical Corporation | 4525 |
2 |
| Beijing GoldWind Science & Creation Windpower Equipment Co., Ltd. | 367 |
2 |
| Central Motor Wheel Co., Ltd. | 91 |
2 |
| Duke Manufacturing Co. | 104 |
2 |
| Gautschi Engineering GmbH | 12 |
2 |
| Ipsen International GmbH | 38 |
2 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2869 |
2 |
| Other owners | 78 |