- 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: 721
10-year publication summary
|
64
|
46
|
66
|
58
|
58
|
41
|
33
|
23
|
25
|
11
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sumitomo Electric Industries, Ltd. | 15377 |
31 |
| Cisco Technology, Inc. | 19655 |
28 |
| Toshiba Corporation | 12300 |
18 |
| Mitsubishi Electric Corporation | 45860 |
15 |
| Nippon Telegraph and Telephone Corporation | 17207 |
12 |
| Avago Technologies International Sales Pte. Limited | 8829 |
12 |
| NEC Corporation | 35424 |
11 |
| Texas Instruments Incorporated | 19482 |
11 |
| Huawei Technologies Co., Ltd. | 111237 |
11 |
| Marvell Asia PTE, Ltd. | 6561 |
11 |
| Cavium International | 5078 |
11 |
| Analog Devices, Inc. | 3389 |
10 |
| Hamamatsu Photonics K.K. | 4390 |
10 |
| Fujitsu Limited | 18362 |
9 |
| Raytheon Company | 8388 |
9 |
| II-VI Delaware, Inc. | 1690 |
9 |
| Hewlett Packard Enterprise Development LP | 10708 |
8 |
| ams International AG | 429 |
7 |
| Analog Devices International Unlimited Company | 1883 |
7 |
| Samsung Electronics Co., Ltd. | 144426 |
6 |
| Other owners | 475 |