- 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: 732
10-year publication summary
|
64
|
64
|
46
|
66
|
58
|
58
|
41
|
31
|
18
|
8
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sumitomo Electric Industries, Ltd. | 14131 |
30 |
| Cisco Technology, Inc. | 18858 |
28 |
| Toshiba Corporation | 12017 |
17 |
| Mitsubishi Electric Corporation | 43934 |
15 |
| Avago Technologies International Sales Pte. Limited | 9260 |
13 |
| NEC Corporation | 32703 |
12 |
| Nippon Telegraph and Telephone Corporation | 14195 |
12 |
| Fujitsu Limited | 19265 |
11 |
| Marvell Asia PTE, Ltd. | 6841 |
11 |
| Cavium International | 5549 |
11 |
| Huawei Technologies Co., Ltd. | 100781 |
10 |
| II-VI Delaware, Inc. | 1720 |
10 |
| Texas Instruments Incorporated | 19376 |
9 |
| Analog Devices, Inc. | 3475 |
9 |
| Hamamatsu Photonics K.K. | 4161 |
9 |
| International Business Machines Corporation | 60644 |
8 |
| Raytheon Company | 8535 |
8 |
| NTT Electronics Corporation | 283 |
8 |
| Hewlett Packard Enterprise Development LP | 10702 |
8 |
| ams International AG | 399 |
7 |
| Other owners | 486 |