- All sections
- H - Electricity
- H01J - Electric discharge tubes or discharge lamps
- H01J 1/34 - Photo-emissive cathodes
Patent holdings for IPC class H01J 1/34
Total number of patents in this class: 163
10-year publication summary
|
13
|
11
|
8
|
12
|
18
|
18
|
12
|
10
|
17
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hamamatsu Photonics K.K. | 4441 |
28 |
| KLA-Tencor Corporation | 2544 |
14 |
| Photo Electron Soul Inc. | 32 |
11 |
| Photonis France | 54 |
9 |
| Elbit Systems of America, LLC | 187 |
7 |
| Hitachi High-Tech Corporation | 5357 |
6 |
| L3Harris Technologies, Inc. | 303 |
4 |
| Arizona Board of Regents on behalf of Arizona State University | 2658 |
3 |
| National University Corporation Nagoya University | 847 |
3 |
| National University Corporation Shizuoka University | 386 |
3 |
| Radiation Monitoring Devices, Inc. | 83 |
3 |
| Technical University of Denmark | 157 |
3 |
| Triad National Security, LLC | 613 |
3 |
| KLA Corporation | 1598 |
3 |
| Photonics West, LLC | 23 |
3 |
| International Business Machines Corporation | 61402 |
2 |
| Centre National de La Recherche Scientifique | 10498 |
2 |
| ASML Netherlands B.V. | 7429 |
2 |
| The United States of America as represented by the Secretary of the Navy | 2772 |
2 |
| The Board of Trustees of the Leland Stanford Junior University | 6447 |
2 |
| Other owners | 50 |