- All sections
- H - Electricity
- H04M - Telephonic communication
- H04M 1/673 - Preventing unauthorised calls from a telephone set by electronic means the user being required to key in a code
Patent holdings for IPC class H04M 1/673
Total number of patents in this class: 138
10-year publication summary
|
22
|
18
|
22
|
19
|
21
|
14
|
4
|
5
|
5
|
1
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Apple Inc. | 50209 |
21 |
| Nokia Corporation | 6965 |
7 |
| Samsung Electronics Co., Ltd. | 131630 |
6 |
| Kyocera Corporation | 12735 |
6 |
| Malikie Innovations Limited | 7703 |
6 |
| LG Electronics Inc. | 69257 |
5 |
| Microsoft Technology Licensing, LLC | 51439 |
4 |
| NEC Corporation | 32703 |
3 |
| Huawei Technologies Co., Ltd. | 100781 |
3 |
| ZTE Corporation | 39218 |
3 |
| Motorola Mobility LLC | 2493 |
3 |
| Huawei Device Co., Ltd. | 2758 |
3 |
| Guangdong Oppo Mobile Telecommunications Corp., Ltd. | 18739 |
3 |
| Advanced New Technologies Co., Ltd. | 2617 |
3 |
| Qualcomm Incorporated | 76576 |
2 |
| AT&T Mobility II LLC | 1982 |
2 |
| Wistron Corporation | 2270 |
2 |
| Xiaomi Inc. | 1683 |
2 |
| AirWatch LLC | 472 |
2 |
| Huizhou TCL Mobile Communication Co., Ltd. | 1085 |
2 |
| Other owners | 50 |