- 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: 488
10-year publication summary
|
43
|
40
|
34
|
30
|
37
|
37
|
28
|
27
|
28
|
4
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi High-Tech Corporation | 5596 |
67 |
| Hitachi High-Technologies Corporation | 1993 |
63 |
| ASML Netherlands B.V. | 7689 |
35 |
| FEI Company | 1025 |
32 |
| Axcelis Technologies, Inc. | 431 |
16 |
| JEOL Ltd. | 613 |
16 |
| Nikon Corporation | 7263 |
12 |
| V Technology Co., Ltd. | 380 |
12 |
| Applied Materials, Inc. | 19849 |
10 |
| Carl Zeiss Microscopy GmbH | 1246 |
8 |
| Carl Zeiss Microscopy, LLC | 27 |
7 |
| Applied Materials Israel, Ltd. | 638 |
6 |
| Tokyo Electron Limited | 13452 |
6 |
| Canon Anelva Corporation | 686 |
5 |
| Mapper Lithography IP B.V. | 131 |
5 |
| Mochii, Inc. | 19 |
5 |
| Protochips, Inc. | 79 |
5 |
| Airsem Technologies Ltd | 13 |
5 |
| Hitachi High-Tech Analysis Corporation | 286 |
5 |
| bioMerieux, Inc. | 449 |
4 |
| Other owners | 164 |