- 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: 162
10-year publication summary
|
13
|
12
|
8
|
12
|
20
|
20
|
12
|
10
|
16
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hamamatsu Photonics K.K. | 4405 |
27 |
| KLA-Tencor Corporation | 2545 |
14 |
| Photo Electron Soul Inc. | 32 |
11 |
| Photonis France | 53 |
9 |
| Elbit Systems of America, LLC | 188 |
7 |
| Hitachi High-Tech Corporation | 5282 |
6 |
| Arizona Board of Regents on behalf of Arizona State University | 2605 |
3 |
| National University Corporation Nagoya University | 859 |
3 |
| National University Corporation Shizuoka University | 390 |
3 |
| Radiation Monitoring Devices, Inc. | 83 |
3 |
| Technical University of Denmark | 157 |
3 |
| Triad National Security, LLC | 604 |
3 |
| L3Harris Technologies, Inc. | 292 |
3 |
| KLA Corporation | 1532 |
3 |
| Photonics West, LLC | 23 |
3 |
| International Business Machines Corporation | 61207 |
2 |
| Centre National de La Recherche Scientifique | 10414 |
2 |
| ASML Netherlands B.V. | 7361 |
2 |
| The United States of America as represented by the Secretary of the Navy | 2747 |
2 |
| The Board of Trustees of the Leland Stanford Junior University | 6402 |
2 |
| Other owners | 51 |