- 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: 911
10-year publication summary
|
76
|
46
|
80
|
75
|
68
|
90
|
91
|
89
|
65
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| FEI Company | 895 |
97 |
| Applied Materials, Inc. | 17745 |
74 |
| Hitachi High-Tech Corporation | 5050 |
58 |
| Hitachi High-Tech Science Corporation | 323 |
35 |
| NuFlare Technology, Inc. | 806 |
30 |
| Carl Zeiss Microscopy GmbH | 1172 |
29 |
| Carl Zeiss SMT GmbH | 2815 |
27 |
| Applied Materials Israel, Ltd. | 578 |
25 |
| Canon Anelva Corporation | 682 |
23 |
| Tokyo Electron Limited | 12115 |
18 |
| Nikon Corporation | 7123 |
16 |
| Varian Semiconductor Equipment Associates, Inc. | 1251 |
15 |
| JEOL Ltd. | 562 |
15 |
| Hitachi High-Technologies Corporation | 2018 |
14 |
| Advantest Corporation | 1843 |
14 |
| Arcam AB | 202 |
14 |
| Taiwan Semiconductor Manufacturing Company, Ltd. | 40608 |
13 |
| Lam Research Corporation | 5001 |
11 |
| ALIS Corporation | 35 |
8 |
| Fibics Incorporated | 25 |
8 |
| Other owners | 367 |