- All sections
- H - Electricity
- H01J - Electric discharge tubes or discharge lamps
- H01J 9/12 - Manufacture of electrodes or electrode systems of photo-emissive cathodesManufacture of electrodes or electrode systems of secondary-emission electrodes
Patent holdings for IPC class H01J 9/12
Total number of patents in this class: 114
10-year publication summary
|
4
|
8
|
7
|
9
|
11
|
6
|
7
|
4
|
7
|
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. | 4391 |
17 |
| Elbit Systems of America, LLC | 187 |
8 |
| Hon Hai Precision Industry Co., Ltd. | 4040 |
7 |
| Tsinghua University | 5855 |
7 |
| UChicago Argonne, LLC | 910 |
5 |
| The University of Chicago | 1392 |
5 |
| Photonis France | 57 |
4 |
| Triad National Security, LLC | 603 |
4 |
| Brookhaven Science Associates, LLC | 197 |
3 |
| Radiation Monitoring Devices, Inc. | 83 |
3 |
| International Business Machines Corporation | 61144 |
2 |
| Centre National de La Recherche Scientifique | 10395 |
2 |
| GE Aviation Systems LLC | 582 |
2 |
| L3Harris Technologies, Inc. | 292 |
2 |
| Samsung Display Co., Ltd. | 34349 |
1 |
| The Regents of the University of California | 19859 |
1 |
| Hewlett-Packard Development Company, L.P. | 25933 |
1 |
| The Board of Trustees of the Leland Stanford Junior University | 6394 |
1 |
| Thales SA | 2336 |
1 |
| Applied Nanotech Holdings, Inc. | 54 |
1 |
| Other owners | 37 |