- 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: 43
10-year publication summary
|
0
|
3
|
5
|
3
|
2
|
2
|
3
|
0
|
1
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| NT IP Holdings, LLC | 17 |
6 |
| BCE Inc. | 431 |
5 |
| British Telecommunications Public Limited Company | 2575 |
3 |
| NetTalk.com, Inc. | 3 |
2 |
| ProjectOne Solutions, Inc. | 4 |
2 |
| BlackBerry Limited | 5958 |
1 |
| Siemens AG | 24990 |
1 |
| NEC Corporation | 32703 |
1 |
| Nokia Corporation | 6965 |
1 |
| Panasonic Corporation | 20786 |
1 |
| Robert Bosch GmbH | 40953 |
1 |
| Kyocera Corporation | 12735 |
1 |
| NTT DoCoMo, Inc. | 11501 |
1 |
| ZTE Corporation | 39218 |
1 |
| RingCentral, Inc. | 731 |
1 |
| Calix, Inc. | 134 |
1 |
| Corning Cable Systems LLC | 455 |
1 |
| MaxLinear, Inc. | 708 |
1 |
| Nokia Inc. | 2036 |
1 |
| Reseaux Mems, Societe en Commandite | 1 |
1 |
| Other owners | 10 |