- All sections
- H - Electricity
- H04M - Telephonic communication
- H04M 15/04 - Recording calls in printed, perforated, or other permanent form
Patent holdings for IPC class H04M 15/04
Total number of patents in this class: 10
10-year publication summary
|
2
|
5
|
1
|
3
|
0
|
2
|
0
|
0
|
0
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Inmate Text Service, LLC | 5 |
3 |
| AT&T Intellectual Property I, L.P. | 9831 |
1 |
| Ericsson | 22283 |
1 |
| Deutsche Telekom AG | 1819 |
1 |
| Five9, Inc. | 40 |
1 |
| T-Mobile USA, Inc. | 4388 |
1 |
| Telefonaktiebolaget LM Ericsson (publ) | 28615 |
1 |
| BlueNote Networks, Inc. | 4 |
1 |
| Other owners | 0 |