- 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 7/04 - Circulating atmospheres by mechanical means
Patent holdings for IPC class F27D 7/04
Total number of patents in this class: 149
10-year publication summary
15
|
13
|
12
|
15
|
7
|
16
|
9
|
8
|
9
|
0
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
JFE Steel Corporation | 6067 |
9 |
Quintus Technologies AB | 61 |
8 |
Illinois Tool Works Inc. | 11152 |
6 |
Corning Incorporated | 9932 |
6 |
IHI Corporation | 3268 |
6 |
IHI Machinery and Furnace Co., Ltd. | 79 |
6 |
ECM Technologies | 29 |
5 |
Ebner Industrieofenbau GmbH | 132 |
4 |
Pan Pacific Copper Co., Ltd. | 31 |
3 |
POSCO | 2222 |
3 |
Primetals Technologies Austria GmbH | 479 |
3 |
The Boeing Company | 19843 |
2 |
Tokyo Electron Limited | 11599 |
2 |
Mitsubishi Chemical Corporation | 4313 |
2 |
Beijing GoldWind Science & Creation Windpower Equipment Co., Ltd. | 332 |
2 |
Central Motor Wheel Co., Ltd. | 92 |
2 |
Duke Manufacturing Co. | 97 |
2 |
Gautschi Engineering GmbH | 12 |
2 |
Ipsen International GmbH | 40 |
2 |
Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
2 |
Other owners | 72 |