- All sections
- G - Physics
- G06F - Electric digital data processing
- G06F 21/20 - by restricting access to nodes in a computer system or computer network
Patent holdings for IPC class G06F 21/20
Total number of patents in this class: 870
10-year publication summary
|
2
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0
|
3
|
3
|
1
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1
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0
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0
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0
|
0
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Microsoft Corporation | 10009 |
60 |
| Intel Corporation | 47221 |
46 |
| NEC Corporation | 36108 |
44 |
| Fujitsu Limited | 18087 |
30 |
| Panasonic Corporation | 20036 |
26 |
| Hewlett-Packard Development Company, L.P. | 25776 |
22 |
| Samsung Electronics Co., Ltd. | 147787 |
14 |
| International Business Machines Corporation | 61537 |
14 |
| Kabushiki Kaisha Toshiba, doing business as Toshiba Corporation | 6261 |
14 |
| Hitachi, Ltd. | 15588 |
12 |
| Canon Kabushiki Kaisha | 7088 |
12 |
| Apple Inc. | 55491 |
11 |
| Sharp Kabushiki Kaisha | 18693 |
11 |
| IBM United Kingdom Limited | 4305 |
10 |
| Toshiba Solutions Corporation | 261 |
10 |
| Sony Corporation | 30921 |
9 |
| NTT DoCoMo, Inc. | 13342 |
9 |
| Nippon Telegraph and Telephone Corporation | 17324 |
9 |
| Telefonaktiebolaget LM Ericsson (publ) | 28272 |
8 |
| Google Inc. | 4212 |
7 |
| Other owners | 492 |