- 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: 507
10-year publication summary
|
43
|
40
|
35
|
30
|
37
|
37
|
29
|
28
|
27
|
22
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi High-Tech Corporation | 5987 |
68 |
| Hitachi High-Technologies Corporation | 1986 |
63 |
| ASML Netherlands B.V. | 8033 |
37 |
| FEI Company | 1063 |
35 |
| Axcelis Technologies, Inc. | 425 |
16 |
| JEOL Ltd. | 627 |
16 |
| Nikon Corporation | 7229 |
12 |
| V Technology Co., Ltd. | 381 |
12 |
| Carl Zeiss Microscopy GmbH | 1302 |
10 |
| Applied Materials, Inc. | 20601 |
9 |
| Carl Zeiss Microscopy, LLC | 27 |
7 |
| Applied Materials Israel, Ltd. | 690 |
6 |
| Tokyo Electron Limited | 13956 |
6 |
| bioMerieux, Inc. | 453 |
5 |
| Canon Anelva Corporation | 689 |
5 |
| Mapper Lithography IP B.V. | 129 |
5 |
| Mochii, Inc. | 19 |
5 |
| Protochips, Inc. | 80 |
5 |
| Carl Zeiss MultiSEM GmbH | 194 |
5 |
| Airsem Technologies Ltd | 13 |
5 |
| Other owners | 175 |