Wavelength cross connect device, and wavelength cross connect method
US-12563323-B2 · Feb 24, 2026 · US
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Kawahara Hiroki patents
Kawahara Hiroki is listed as an inventor on 51 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Kawahara Hiroki |
| Total patents | 51 |
| First publication | Aug 17, 2017 |
| Latest publication | Feb 24, 2026 |
Notable patents
Publications ranked by popularity score, then publication date.
Multipath interference analysis device and multipath interference analysis method
US-12463724-B2 · Nov 4, 2025 · US
Wavelength cross connect device, multiband transmission system, and multiband transmission method
US-12316383-B2 · May 27, 2025 · US
Wavelength cross connect device and wavelength cross connect method
US-12244346-B2 · Mar 4, 2025 · US
Optical node device, optical transport network system, optical path trace method and program
US-12207030-B2 · Jan 21, 2025 · US
Wavelength cross connect device, and wavelength cross connect method
US-2024422456-A1 · Dec 19, 2024 · US
Wavelength cross connect device, and wavelength cross connect method
US-2024373152-A1 · Nov 7, 2024 · US
Wavelength cross connect device, and wavelength cross connect method
US-2024283557-A1 · Aug 22, 2024 · US
Wavelength cross connect device, and wavelength cross connect method
US-2024284079-A1 · Aug 22, 2024 · US
Multipath interference analysis device and multipath interference analysis method
US-2024204873-A1 · Jun 20, 2024 · US
Recent patents
Latest publications not already listed above.
Wavelength cross connect device and wavelength cross connect method
US-11979226-B2 · May 7, 2024 · US
Cyclic wavelength band replacement device, multi-band transmission system, and cyclic wavelength band replacement method
US-11824583-B2 · Nov 21, 2023 · US
Optical cross-connect device, optical transmission system, and optical transmission line connection error detection method
US-11812205-B2 · Nov 7, 2023 · US
Wavelength cross connect device and cross connect connection method
US-11750317-B2 · Sep 5, 2023 · US
Wavelength cross connect device, multiband transmission system, and multiband transmission method
US-2023275668-A1 · Aug 31, 2023 · US
Wavelength cross connect device and wavelength cross connect method
US-2023275667-A1 · Aug 31, 2023 · US
Optical transmission system and design method for opticaltransmission system
US-2023268998-A1 · Aug 24, 2023 · US
Optical node device, optical transport network system, optical path trace method and program
US-2023254611-A1 · Aug 10, 2023 · US
Optical branch insertion device and optical branch insertion method
US-11722235-B2 · Aug 8, 2023 · US
Multi-core fiber, optical transmission system, and optical transmission method
US-2023244025-A1 · Aug 3, 2023 · US
Optical transmission system and optical transmission method
US-11696056-B2 · Jul 4, 2023 · US
Wavelength cross connect device, branch ratio variable method, and program
US-11677489-B2 · Jun 13, 2023 · US
Cyclic wavelength band replacement device, multi-band transmission system, and cyclic wavelength band replacement method
US-2023074213-A1 · Mar 9, 2023 · US
Wavelength cross connect device and wavelength cross connect method
US-2023067932-A1 · Mar 2, 2023 · US
Optical amplifier, receiver, optical transmission system, and optical amplifier design method
US-2022416897-A1 · Dec 29, 2022 · US
Optical transmission system and failure diagnosis method for optical transmission system
US-11528080-B2 · Dec 13, 2022 · US
Optical cross-connect device, optical transmission system, and optical transmission line connection error detection method
US-2022286762-A1 · Sep 8, 2022 · US
OSNR spectrum estimation apparatus, OSNR spectrum estimation method, and program
US-11424824-B2 · Aug 23, 2022 · US
Maintenance support system and maintenance support method
US-11379801-B2 · Jul 5, 2022 · US
Wiring management system and wiring management method
US-11362894-B2 · Jun 14, 2022 · US
Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Nippon Telegraph & Telephone | 39 |
| Panasonic Ip Man Co Ltd | 6 |
| Tlv Co Ltd | 4 |
| Ntt Inc | 2 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| H04Q11/0005 | 23 |
| H04Q2011/0016 | 19 |
| H04J14/0212 | 15 |
| H04B10/27 | 14 |
| H04B10/291 | 12 |