- All sections
- H - Electricity
- H01J - Electric discharge tubes or discharge lamps
- H01J 37/141 - Electromagnetic lenses
Patent holdings for IPC class H01J 37/141
Total number of patents in this class: 250
10-year publication summary
|
22
|
14
|
20
|
17
|
32
|
30
|
19
|
19
|
19
|
6
|
| 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 |
37 |
| Hitachi High-Technologies Corporation | 2034 |
23 |
| ASML Netherlands B.V. | 6816 |
23 |
| NuFlare Technology, Inc. | 770 |
20 |
| JEOL Ltd. | 556 |
11 |
| Carl Zeiss Microscopy GmbH | 1146 |
8 |
| Matsusada Precision, Inc. | 33 |
7 |
| FEI Company | 851 |
6 |
| Varian Semiconductor Equipment Associates, Inc. | 1282 |
5 |
| Advantest Corporation | 1939 |
5 |
| KLA-Tencor Corporation | 2574 |
5 |
| Hermes Microvision Incorporated B.V. | 129 |
5 |
| KLA Corporation | 1223 |
5 |
| Hitachi, Ltd. | 16452 |
4 |
| Applied Materials Israel, Ltd. | 549 |
3 |
| IMS Nanofabrication GmbH | 56 |
3 |
| Riken | 1669 |
3 |
| Carl Zeiss MultiSEM GmbH | 85 |
3 |
| Balakin, Andrey Vladimirovich | 65 |
3 |
| Balakin, Pavel Vladimirovich | 65 |
3 |
| Other owners | 68 |