- All sections
- H - Electricity
- H04M - Telephonic communication
- H04M 1/738 - Interface circuits for coupling substations to external telephone lines
Patent holdings for IPC class H04M 1/738
Total number of patents in this class: 37
10-year publication summary
|
4
|
2
|
2
|
2
|
3
|
0
|
1
|
1
|
0
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| NT IP Holdings, LLC | 15 |
6 |
| British Telecommunications Public Limited Company | 2596 |
3 |
| BCE Inc. | 349 |
3 |
| NetTalk.com, Inc. | 3 |
2 |
| Samsung Electronics Co., Ltd. | 153573 |
1 |
| BlackBerry Limited | 5003 |
1 |
| NEC Corporation | 36611 |
1 |
| Panasonic Corporation | 19680 |
1 |
| Robert Bosch GmbH | 43554 |
1 |
| Kyocera Corporation | 14241 |
1 |
| NTT DoCoMo, Inc. | 14250 |
1 |
| ZTE Corporation | 43576 |
1 |
| RingCentral, Inc. | 785 |
1 |
| Calix, Inc. | 143 |
1 |
| Corning Cable Systems LLC | 373 |
1 |
| MaxLinear, Inc. | 842 |
1 |
| ProjectOne Solutions, Inc. | 3 |
1 |
| Reseaux Mems, Societe en Commandite | 1 |
1 |
| Sangmyung University Industry-Academy Cooperation Foundation | 47 |
1 |
| Comtest Networks Inc. | 4 |
1 |
| Other owners | 7 |