- All sections
- H - Electricity
- H04L - Transmission of digital information, e.g. telegraphic communication
- H04L 51/21 - Monitoring or handling of messages
Patent holdings for IPC class H04L 51/21
Total number of patents in this class: 108
10-year publication summary
|
0
|
3
|
1
|
2
|
2
|
0
|
7
|
28
|
52
|
24
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Microsoft Technology Licensing, LLC | 51439 |
10 |
| Snap Inc. | 4604 |
5 |
| Shopify Inc. | 619 |
3 |
| Yahoo Assets LLC | 1127 |
3 |
| Apple Inc. | 50209 |
2 |
| NEC Corporation | 32703 |
2 |
| Amazon Technologies, Inc. | 24422 |
2 |
| Capital One Services, LLC. | 7551 |
2 |
| Expensify, Inc. | 91 |
2 |
| Iterable, Inc. | 10 |
2 |
| Tencent Technology (Shenzhen) Company Limited | 12951 |
2 |
| Twilio, Inc. | 456 |
2 |
| ZixCorp Systems, Inc. | 111 |
2 |
| Vivo Mobile Communication Co., Ltd. | 9833 |
2 |
| LeapXpert Limited | 12 |
2 |
| Beijing Zitiao Network Technology Co., Ltd. | 1927 |
2 |
| Yahoo Ad Tech LLC | 569 |
2 |
| Winter Chat Pty Ltd | 4 |
2 |
| Sunbird Messaging Inc. | 4 |
2 |
| Samsung Electronics Co., Ltd. | 131630 |
1 |
| Other owners | 56 |