- 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: 882
10-year publication summary
|
64
|
76
|
46
|
80
|
75
|
68
|
89
|
89
|
89
|
20
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| FEI Company | 851 |
92 |
| Applied Materials, Inc. | 16587 |
68 |
| Hitachi High-Tech Corporation | 4424 |
46 |
| Hitachi High-Tech Science Corporation | 326 |
38 |
| NuFlare Technology, Inc. | 770 |
30 |
| Carl Zeiss Microscopy GmbH | 1146 |
29 |
| Canon Anelva Corporation | 676 |
22 |
| Applied Materials Israel, Ltd. | 549 |
21 |
| Carl Zeiss SMT GmbH | 2646 |
20 |
| Tokyo Electron Limited | 11599 |
17 |
| Nikon Corporation | 7162 |
16 |
| Varian Semiconductor Equipment Associates, Inc. | 1282 |
15 |
| JEOL Ltd. | 556 |
15 |
| Hitachi High-Technologies Corporation | 2034 |
14 |
| Advantest Corporation | 1939 |
14 |
| Arcam AB | 204 |
14 |
| Taiwan Semiconductor Manufacturing Company, Ltd. | 36809 |
12 |
| Lam Research Corporation | 4775 |
10 |
| Pioneer Corporation | 4843 |
8 |
| ALIS Corporation | 36 |
8 |
| Other owners | 373 |