- All sections
- H - Electricity
- H01J - Electric discharge tubes or discharge lamps
- H01J 37/18 - Vacuum locks
Patent holdings for IPC class H01J 37/18
Total number of patents in this class: 443
10-year publication summary
|
56
|
47
|
43
|
41
|
35
|
30
|
37
|
34
|
28
|
7
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi High-Tech Corporation | 4424 |
65 |
| Hitachi High-Technologies Corporation | 2034 |
63 |
| FEI Company | 851 |
29 |
| ASML Netherlands B.V. | 6816 |
27 |
| Axcelis Technologies, Inc. | 429 |
15 |
| JEOL Ltd. | 556 |
14 |
| V Technology Co., Ltd. | 394 |
12 |
| Nikon Corporation | 7162 |
11 |
| Carl Zeiss Microscopy GmbH | 1146 |
9 |
| Carl Zeiss Microscopy, LLC | 30 |
7 |
| Hitachi High-Tech Science Corporation | 326 |
6 |
| Tokyo Electron Limited | 11599 |
6 |
| Applied Materials, Inc. | 16587 |
5 |
| Applied Materials Israel, Ltd. | 549 |
5 |
| Canon Anelva Corporation | 676 |
5 |
| Intevac, Inc. | 127 |
5 |
| Mapper Lithography IP B.V. | 136 |
5 |
| Protochips, Inc. | 71 |
5 |
| bioMerieux, Inc. | 391 |
4 |
| Hermes Microvision, Inc. | 25 |
4 |
| Other owners | 141 |