- All sections
- H - Electricity
- H01J - Electric discharge tubes or discharge lamps
- H01J 37/305 - Electron-beam or ion-beam tubes for localised treatment of objects for casting, melting, evaporating, or etching
Patent holdings for IPC class H01J 37/305
Total number of patents in this class: 928
10-year publication summary
|
76
|
46
|
80
|
75
|
68
|
90
|
91
|
89
|
66
|
22
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| FEI Company | 921 |
98 |
| Applied Materials, Inc. | 18231 |
75 |
| Hitachi High-Tech Corporation | 5172 |
60 |
| Hitachi High-Tech Science Corporation | 325 |
35 |
| Carl Zeiss SMT GmbH | 2886 |
30 |
| NuFlare Technology, Inc. | 824 |
30 |
| Carl Zeiss Microscopy GmbH | 1194 |
29 |
| Applied Materials Israel, Ltd. | 588 |
25 |
| Canon Anelva Corporation | 686 |
23 |
| Tokyo Electron Limited | 12300 |
21 |
| Nikon Corporation | 7138 |
16 |
| JEOL Ltd. | 566 |
16 |
| Varian Semiconductor Equipment Associates, Inc. | 1239 |
15 |
| Hitachi High-Technologies Corporation | 2014 |
14 |
| Taiwan Semiconductor Manufacturing Company, Ltd. | 41443 |
14 |
| Arcam AB | 203 |
14 |
| Advantest Corporation | 1836 |
13 |
| Lam Research Corporation | 5102 |
11 |
| Samsung Electronics Co., Ltd. | 141620 |
8 |
| ALIS Corporation | 35 |
8 |
| Other owners | 373 |