- 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: 977
10-year publication summary
|
3
|
2
|
0
|
3
|
3
|
1
|
1
|
0
|
0
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Microsoft Corporation | 10954 |
61 |
| NEC Corporation | 32703 |
49 |
| Intel Corporation | 45621 |
48 |
| Fujitsu Limited | 19265 |
31 |
| Panasonic Corporation | 20786 |
26 |
| Matsushita Electric Industrial Co., Ltd. | 4724 |
24 |
| Hewlett-Packard Development Company, L.P. | 28538 |
22 |
| International Business Machines Corporation | 60644 |
17 |
| Kabushiki Kaisha Toshiba, doing business as Toshiba Corporation | 6275 |
15 |
| Sharp Kabushiki Kaisha | 18957 |
15 |
| Samsung Electronics Co., Ltd. | 131630 |
14 |
| Canon Kabushiki Kaisha | 6884 |
14 |
| Apple Inc. | 50209 |
12 |
| Hitachi, Ltd. | 16452 |
12 |
| NTT DoCoMo, Inc. | 11501 |
12 |
| IBM United Kingdom Limited | 4467 |
12 |
| Sony Corporation | 32931 |
11 |
| Toshiba Solutions Corporation | 274 |
11 |
| Cisco Technology, Inc. | 18858 |
10 |
| Pioneer Corporation | 4843 |
9 |
| Other owners | 552 |