- All sections
- H - Electricity
- H04M - Telephonic communication
- H04M 7/04 - Arrangements for interconnection between switching centres for compensating differences of line impedance
Patent holdings for IPC class H04M 7/04
Total number of patents in this class: 10
10-year publication summary
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0
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0
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0
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0
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0
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0
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0
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1
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0
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0
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Adtran, Inc. | 410 |
2 |
| Panasonic Corporation | 19386 |
1 |
| National Semiconductor Corporation | 873 |
1 |
| Newport Media, Inc. | 25 |
1 |
| Hewlett Packard Enterprise Development LP | 10932 |
1 |
| Actelis Networks Inc. | 8 |
1 |
| Dali Systems Co. Ltd. | 114 |
1 |
| KEPCO Engineering & Construction Company, Inc. | 79 |
1 |
| Tyco Fire & Security GmbH | 3606 |
1 |
| Other owners | 0 |