- All sections
- H - Electricity
- H04M - Telephonic communication
- H04M 1/665 - Preventing unauthorised calls to a telephone set by checking the validity of a code
Patent holdings for IPC class H04M 1/665
Total number of patents in this class: 31
10-year publication summary
|
4
|
3
|
5
|
6
|
1
|
6
|
2
|
1
|
1
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Semafone Limited | 12 |
3 |
| ZTE Corporation | 39218 |
2 |
| Microsoft Technology Licensing, LLC | 51439 |
2 |
| Samsung Electronics Co., Ltd. | 131630 |
1 |
| Apple Inc. | 50209 |
1 |
| BlackBerry Limited | 5958 |
1 |
| Qualcomm Incorporated | 76576 |
1 |
| AT&T Intellectual Property I, L.P. | 9886 |
1 |
| Nokia Corporation | 6965 |
1 |
| Bank of America Corporation | 6495 |
1 |
| Alibaba Group Holding Limited | 7149 |
1 |
| GM Global Technology Operations LLC | 13620 |
1 |
| Industrial Technology Research Institute | 4898 |
1 |
| Sanyo Electric Co., Ltd. | 3926 |
1 |
| Tottori Sanyo Electric Co., Ltd. | 17 |
1 |
| NTT DoCoMo, Inc. | 11501 |
1 |
| AT&T Mobility II LLC | 1982 |
1 |
| Nokia Technologies Oy | 15057 |
1 |
| Dialogtech Inc. | 19 |
1 |
| Payfone, Inc. | 72 |
1 |
| Other owners | 7 |