- All sections
- H - Electricity
- H04M - Telephonic communication
- H04M 3/08 - Indicating faults in circuits or apparatus
Patent holdings for IPC class H04M 3/08
Total number of patents in this class: 313
10-year publication summary
|
41
|
27
|
30
|
22
|
12
|
4
|
5
|
4
|
4
|
1
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| British Telecommunications Public Limited Company | 2575 |
24 |
| AT&T Intellectual Property I, L.P. | 9886 |
19 |
| Ericsson | 20417 |
17 |
| Cisco Technology, Inc. | 18858 |
11 |
| Huawei Technologies Co., Ltd. | 100781 |
11 |
| Adtran, Inc. | 443 |
9 |
| Adaptive Spectrum and Signal Alignment, Inc. | 137 |
6 |
| Assia SPE LLC, c/o The Corporation Trust Company | 108 |
6 |
| Microsoft Technology Licensing, LLC | 51439 |
5 |
| ARRIS Enterprises LLC | 3432 |
5 |
| MaxLinear, Inc. | 708 |
5 |
| Avago Technologies International Sales Pte. Limited | 9260 |
5 |
| CenturyLink Intellectual Property LLC | 1130 |
4 |
| Global Tel*Link Corporation | 431 |
4 |
| Mattersight Corporation | 77 |
4 |
| Tollgrade Communications, Inc. (Pennsylvania) | 7 |
4 |
| Viavi Solutions Inc. | 1363 |
4 |
| Keysight Technologies Singapore (Sales) Pte. Ltd | 423 |
4 |
| Amphenol Network Solutions, Inc. | 65 |
4 |
| Verizon Patent And Licensing Inc. | 6900 |
3 |
| Other owners | 159 |