- All sections
- H - Electricity
- H04L - Transmission of digital information, e.g. telegraphic communication
- H04L 9/30 - Public key, i.e. encryption algorithm being computationally infeasible to invert and users' encryption keys not requiring secrecy
Patent holdings for IPC class H04L 9/30
Total number of patents in this class: 6452
10-year publication summary
297
|
368
|
610
|
666
|
844
|
940
|
890
|
757
|
714
|
197
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
International Business Machines Corporation | 60644 |
179 |
Nchain Licensing AG | 612 |
145 |
Visa International Service Association | 4194 |
120 |
Microsoft Technology Licensing, LLC | 51439 |
116 |
Advanced New Technologies Co., Ltd. | 2617 |
110 |
Intel Corporation | 45621 |
105 |
Amazon Technologies, Inc. | 24422 |
95 |
BlackBerry Limited | 5958 |
93 |
Malikie Innovations Limited | 7703 |
93 |
Samsung Electronics Co., Ltd. | 131630 |
84 |
Apple Inc. | 50209 |
84 |
MasterCard International Incorporated | 4846 |
80 |
Cisco Technology, Inc. | 18858 |
67 |
Huawei Technologies Co., Ltd. | 100781 |
66 |
Nippon Telegraph and Telephone Corporation | 14195 |
65 |
Google LLC | 38759 |
64 |
Koninklijke Philips N.V. | 22975 |
59 |
Mitsubishi Electric Corporation | 43934 |
58 |
NEC Corporation | 32703 |
51 |
The Toronto-Dominion Bank | 2288 |
49 |
Other owners | 4669 |