- 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: 718
10-year publication summary
|
64
|
46
|
66
|
57
|
56
|
41
|
32
|
23
|
25
|
16
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sumitomo Electric Industries, Ltd. | 15593 |
31 |
| Cisco Technology, Inc. | 21991 |
28 |
| Toshiba Corporation | 12472 |
18 |
| Mitsubishi Electric Corporation | 46397 |
15 |
| Nippon Telegraph and Telephone Corporation | 17371 |
12 |
| Texas Instruments Incorporated | 19455 |
11 |
| Huawei Technologies Co., Ltd. | 113689 |
11 |
| Marvell Asia PTE, Ltd. | 6521 |
11 |
| Cavium International | 4984 |
11 |
| Avago Technologies International Sales Pte. Limited | 8714 |
11 |
| NEC Corporation | 35935 |
10 |
| Analog Devices, Inc. | 3368 |
10 |
| Hamamatsu Photonics K.K. | 4446 |
10 |
| Fujitsu Limited | 18387 |
9 |
| Raytheon Company | 8393 |
9 |
| II-VI Delaware, Inc. | 1648 |
9 |
| Hewlett Packard Enterprise Development LP | 10740 |
8 |
| ams International AG | 430 |
7 |
| Analog Devices International Unlimited Company | 1949 |
7 |
| Samsung Electronics Co., Ltd. | 147501 |
6 |
| Other owners | 474 |