Optical transmission device and optical transmission system
US-2025211356-A1 · Jun 26, 2025 · US
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Oi Hiroki patents
Oi Hiroki is listed as an inventor on 16 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Oi Hiroki |
| Total patents | 16 |
| First publication | Apr 9, 2015 |
| Latest publication | Jun 26, 2025 |
Notable patents
Publications ranked by popularity score, then publication date.
Forward raman amplifier, bidirectional raman amplification system, and forward raman amplification system
US-2024129034-A1 · Apr 18, 2024 · US
Optical transmission system and fiber type determination method
US-11876559-B2 · Jan 16, 2024 · US
Optical transmission system and fiber type determination method
US-2022385364-A1 · Dec 1, 2022 · US
Optical wavelength multiplexing transmission apparatus and optical wavelength multiplexing transmission method
US-10541749-B2 · Jan 21, 2020 · US
Optical wavelength multiplexing transmission apparatus and optical wavelength multiplexing transmission method
US-2019312641-A1 · Oct 10, 2019 · US
Network controller and signal quality estimating method
US-10256903-B2 · Apr 9, 2019 · US
Optical signal-to-noise ratio monitor and method for measuring optical signal to-noise ratio
US-10020878-B2 · Jul 10, 2018 · US
Network controller and signal quality estimating method
US-2018097562-A1 · Apr 5, 2018 · US
Network controller and signal quality estimating method
US-9906296-B2 · Feb 27, 2018 · US
Recent patents
Latest publications not already listed above.
Network controller and signal quality estimating method
US-2016373187-A1 · Dec 22, 2016 · US
Optical signal-to-noise ratio monitor and method for measuring optical signal-to-noise ratio
US-2016308611-A1 · Oct 20, 2016 · US
Transmission device and transmission method
US-9444572-B2 · Sep 13, 2016 · US
Optical transmission device
US-9432113-B2 · Aug 30, 2016 · US
Optical branching and insertion device, network management device, and wavelength selective switch
US-9071379-B2 · Jun 30, 2015 · US
Optical transmission device
US-2015098696-A1 · Apr 9, 2015 · US
Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Fujitsu Ltd | 16 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| H04B10/07953 | 6 |
| H04B10/07955 | 4 |
| H04J14/0221 | 4 |
| H04B10/0793 | 4 |
| H04J14/0256 | 4 |