- All sections
- H - Electricity
- H04M - Telephonic communication
- H04M 3/56 - Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
Patent holdings for IPC class H04M 3/56
Total number of patents in this class: 3141
10-year publication summary
|
273
|
278
|
226
|
223
|
212
|
243
|
199
|
167
|
97
|
48
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Ricoh Company, Ltd. | 13342 |
150 |
| Microsoft Technology Licensing, LLC | 54466 |
127 |
| Dolby Laboratories Licensing Corporation | 4320 |
111 |
| Google LLC | 44482 |
85 |
| Cisco Technology, Inc. | 22493 |
84 |
| People.ai, Inc. | 148 |
76 |
| Hewlett-Packard Development Company, L.P. | 25184 |
71 |
| International Business Machines Corporation | 62634 |
54 |
| Huawei Technologies Co., Ltd. | 123385 |
46 |
| RingCentral, Inc. | 793 |
45 |
| Zoom Communications, Inc. | 1227 |
40 |
| Qualcomm Incorporated | 92196 |
38 |
| Level 3 Communications, LLC | 1250 |
37 |
| Malikie Innovations Limited | 6455 |
32 |
| BlackBerry Limited | 4898 |
31 |
| Vonage Business Inc. | 178 |
31 |
| West Technology Group, LLC | 408 |
31 |
| Arlington Technologies, LLC | 593 |
30 |
| NEC Corporation | 37004 |
29 |
| Motorola Solutions, Inc. | 4583 |
29 |
| Other owners | 1964 |