- All sections
- H - Electricity
- H04M - Telephonic communication
- H04M 1/74 - Interface circuits for coupling substations to external telephone lines with means for reducing effects due to line faults
Patent holdings for IPC class H04M 1/74
Total number of patents in this class: 41
10-year publication summary
|
4
|
4
|
7
|
6
|
2
|
1
|
1
|
0
|
2
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Boyce Technologies Inc. | 7 |
6 |
| Illinois Tool Works Inc. | 11152 |
3 |
| Enginuity Communications Corporation | 13 |
3 |
| Canon Inc. | 36841 |
2 |
| Apple Inc. | 50209 |
1 |
| Sony Corporation | 32931 |
1 |
| Sony Ericsson Mobile Communications AB | 2014 |
1 |
| Intel Corporation | 45621 |
1 |
| Hon Hai Precision Industry Co., Ltd. | 4157 |
1 |
| Alcatel Lucent SA | 1723 |
1 |
| Huawei Technologies Co., Ltd. | 100781 |
1 |
| Proton World International N.V. | 135 |
1 |
| STMicroelectronics (Tours) SAS | 202 |
1 |
| RPX Corporation | 1571 |
1 |
| JVC Kenwood Corporation | 2774 |
1 |
| China Mobile Communications Corporation | 582 |
1 |
| Corning Optical Communications LLC | 1741 |
1 |
| Fu Tai Hua Industry (Shenzhen) Co., Ltd. | 321 |
1 |
| MaxLinear, Inc. | 708 |
1 |
| Mitel Networks Corporation | 455 |
1 |
| Other owners | 11 |