- All sections
- H - Electricity
- H04M - Telephonic communication
- H04M 15/24 - Discriminative metering preventing metering of tax-free calls to certain lines, e.g. to fire or ambulance stations
Patent holdings for IPC class H04M 15/24
Total number of patents in this class: 10
10-year publication summary
|
1
|
2
|
2
|
1
|
0
|
0
|
0
|
0
|
0
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Openet Telecom Ltd. | 57 |
4 |
| Aeris Communications, Inc. | 141 |
2 |
| Somos, Inc. | 101 |
2 |
| T-Mobile USA, Inc. | 3668 |
2 |
| Other owners | 0 |