- All sections
- H - Electricity
- H03F - Amplifiers
- H03F 3/08 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only controlled by light
Patent holdings for IPC class H03F 3/08
Total number of patents in this class: 712
10-year publication summary
|
64
|
46
|
66
|
57
|
56
|
41
|
32
|
23
|
26
|
17
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sumitomo Electric Industries, Ltd. | 15678 |
31 |
| Cisco Technology, Inc. | 22084 |
28 |
| Toshiba Corporation | 12516 |
17 |
| Mitsubishi Electric Corporation | 46672 |
15 |
| Nippon Telegraph and Telephone Corporation | 16791 |
12 |
| Texas Instruments Incorporated | 19459 |
11 |
| Huawei Technologies Co., Ltd. | 114620 |
11 |
| Marvell Asia PTE, Ltd. | 6439 |
11 |
| Cavium International | 4948 |
11 |
| NEC Corporation | 36136 |
10 |
| Analog Devices, Inc. | 3372 |
10 |
| Hamamatsu Photonics K.K. | 4461 |
10 |
| Avago Technologies International Sales Pte. Limited | 8679 |
10 |
| Raytheon Company | 8407 |
9 |
| II-VI Delaware, Inc. | 1649 |
9 |
| Fujitsu Limited | 17689 |
8 |
| Hewlett Packard Enterprise Development LP | 10755 |
8 |
| ams International AG | 433 |
7 |
| Semtech Corporation | 359 |
7 |
| Analog Devices International Unlimited Company | 1960 |
7 |
| Other owners | 470 |