- All sections
- H - Electricity
- H04M - Telephonic communication
- H04M 3/38 - Graded-service arrangements, i.e. some subscribers prevented from establishing certain connections
Patent holdings for IPC class H04M 3/38
Total number of patents in this class: 487
10-year publication summary
|
71
|
61
|
49
|
54
|
44
|
42
|
39
|
26
|
26
|
5
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Global Tel*Link Corporation | 431 |
47 |
| United Services Automobile Association (USAA) | 2514 |
30 |
| Securus Technologies, LLC | 292 |
20 |
| Microsoft Technology Licensing, LLC | 51439 |
16 |
| Value-Added Communications, Inc. | 20 |
14 |
| International Business Machines Corporation | 60644 |
13 |
| Malikie Innovations Limited | 7703 |
13 |
| Capital One Services, LLC. | 7551 |
10 |
| Samsung Electronics Co., Ltd. | 131630 |
9 |
| Confinement Telephony Technology, LLC | 42 |
9 |
| HomeWAV, LLC | 19 |
9 |
| Intelmate LLC | 44 |
9 |
| NEC Corporation | 32703 |
7 |
| RingCentral, Inc. | 731 |
6 |
| NeuStar, Inc. | 105 |
6 |
| AT&T Intellectual Property I, L.P. | 9886 |
5 |
| Nokia Corporation | 6965 |
5 |
| Callyo 2009 Corp. | 43 |
5 |
| Comcast Cable Communications, LLC | 4075 |
5 |
| Koninklijke KPN N.V. | 742 |
5 |
| Other owners | 244 |