- All sections
- B - Performing operations; transporting
- B28B - Shaping clay or other ceramic compositions; shaping slag; shaping mixtures containing cementitious material, e.g. plaster
- B28B 21/90 - Methods or apparatus for discharging after shaping
Patent holdings for IPC class B28B 21/90
Total number of patents in this class: 9
10-year publication summary
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0
|
1
|
1
|
2
|
1
|
1
|
1
|
0
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0
|
0
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| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Watt Fuel Cell Corp. | 122 |
6 |
| McElroy Manufacturing, Inc. | 72 |
1 |
| da Ho Co.,Ltd | 2 |
1 |
| Taicang Lingchuan Industrial Co. Ltd | 9 |
1 |
| Other owners | 0 |