- All sections
- H - Electricity
- H04B - Transmission
- H04B 13/02 - Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy
Patent holdings for IPC class H04B 13/02
Total number of patents in this class: 539
10-year publication summary
|
39
|
39
|
45
|
46
|
45
|
40
|
42
|
34
|
41
|
24
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Magseis FF LLC | 135 |
17 |
| Csignum Ltd | 18 |
15 |
| Halliburton Energy Services, Inc. | 20924 |
11 |
| Raytheon Company | 8387 |
11 |
| Nippon Telegraph and Telephone Corporation | 17367 |
9 |
| Woods Hole Oceanographic Institution | 140 |
9 |
| Samsung Electronics Co., Ltd. | 147003 |
8 |
| The Boeing Company | 20090 |
8 |
| NEC Corporation | 35793 |
8 |
| Electronics and Telecommunications Research Institute | 9408 |
8 |
| BAE SYSTEMS plc | 2336 |
8 |
| Elliptic Works LLC | 11 |
8 |
| Evolution Engineering Inc. | 301 |
8 |
| King Abdullah University of Science and Technology | 1793 |
8 |
| Wireless Fibre Systems Ltd | 10 |
8 |
| Massachusetts Institute of Technology | 10066 |
7 |
| CPG Technologies, LLC | 99 |
7 |
| Hoseo University Academic Cooperation Foundation | 72 |
7 |
| South China University of Technology | 1791 |
7 |
| Schlumberger Technology Corporation | 10802 |
5 |
| Other owners | 362 |