- All sections
- C - Chemistry; metallurgy
- C30B - Single-crystal growth; unidirectional solidification of eutectic material or unidirectional demixing of eutectoid material; refining by zone-melting of material; production of a homogeneous polycrystalline material with defined structure; single crystals or homogeneous polycrystalline material with defined structure; after-treatment of single crystals or a homogeneous polycrystalline material with defined structure; apparatus therefor
- C30B 29/20 - Aluminium oxides
Patent holdings for IPC class C30B 29/20
Total number of patents in this class: 314
10-year publication summary
36
|
32
|
49
|
31
|
12
|
21
|
14
|
20
|
15
|
5
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Apple Inc. | 50209 |
17 |
Namiki Seimitsu Houseki Kabushiki Kaisha | 171 |
14 |
Kyocera Corporation | 12735 |
11 |
Showa Denko K.K. | 2539 |
10 |
A.L.M.T. Corp. | 209 |
10 |
GTAT Corporation | 114 |
10 |
FAMETEC GmbH | 13 |
9 |
NGK Insulators, Ltd. | 4589 |
8 |
LG Siltron Inc. | 116 |
7 |
PLANSEE SE | 233 |
7 |
Ebner Industrieofenbau GmbH | 132 |
6 |
Saint-Gobain Ceramics & Plastics, Inc. | 812 |
6 |
TDK Corporation | 6306 |
5 |
Sumitomo Chemical Company, Limited | 8808 |
5 |
Luxium Solutions, LLC | 90 |
5 |
National Taiwan University | 1140 |
4 |
Shin-Etsu Handotai Co., Ltd. | 1277 |
4 |
IONICS France | 12 |
4 |
Adamant Namiki Precision Jewel Co., Ltd. | 100 |
4 |
Shin-Etsu Chemical Co., Ltd. | 5132 |
3 |
Other owners | 165 |