- 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: 3147
10-year publication summary
|
265
|
273
|
221
|
219
|
207
|
237
|
195
|
164
|
96
|
17
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Ricoh Company, Ltd. | 13313 |
148 |
| Microsoft Technology Licensing, LLC | 54182 |
127 |
| Dolby Laboratories Licensing Corporation | 4261 |
111 |
| Google LLC | 43643 |
85 |
| Cisco Technology, Inc. | 22240 |
83 |
| Hewlett-Packard Development Company, L.P. | 25403 |
72 |
| People.ai, Inc. | 142 |
72 |
| International Business Machines Corporation | 62123 |
55 |
| Huawei Technologies Co., Ltd. | 119623 |
50 |
| RingCentral, Inc. | 786 |
45 |
| Qualcomm Incorporated | 89782 |
38 |
| Level 3 Communications, LLC | 1255 |
37 |
| Zoom Communications, Inc. | 1066 |
35 |
| BlackBerry Limited | 5047 |
32 |
| Malikie Innovations Limited | 6722 |
32 |
| Vonage Business Inc. | 178 |
31 |
| West Technology Group, LLC | 408 |
31 |
| Arlington Technologies, LLC | 617 |
30 |
| Barco N.V. | 547 |
29 |
| NEC Corporation | 36545 |
28 |
| Other owners | 1976 |