- 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: 474
10-year publication summary
|
47
|
43
|
40
|
35
|
30
|
37
|
37
|
29
|
28
|
17
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi High-Tech Corporation | 5323 |
67 |
| Hitachi High-Technologies Corporation | 2004 |
63 |
| ASML Netherlands B.V. | 7392 |
35 |
| FEI Company | 944 |
31 |
| Axcelis Technologies, Inc. | 412 |
16 |
| JEOL Ltd. | 581 |
15 |
| Nikon Corporation | 7170 |
12 |
| V Technology Co., Ltd. | 384 |
12 |
| Carl Zeiss Microscopy GmbH | 1205 |
8 |
| Carl Zeiss Microscopy, LLC | 27 |
7 |
| Hitachi High-Tech Science Corporation | 289 |
6 |
| Applied Materials, Inc. | 18658 |
6 |
| Applied Materials Israel, Ltd. | 611 |
6 |
| Tokyo Electron Limited | 12733 |
6 |
| Canon Anelva Corporation | 686 |
5 |
| Mapper Lithography IP B.V. | 134 |
5 |
| Protochips, Inc. | 76 |
5 |
| bioMerieux, Inc. | 441 |
4 |
| Hermes Microvision, Inc. | 25 |
4 |
| Intevac, Inc. | 136 |
4 |
| Other owners | 157 |