Inventor
TAKESHI SEKI
Inventor
JP
Overview
Patents· 17 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H04Bprimary
H04BTransmission30%
H04JMultiplex communication21%
H04QSelecting21%
G02BOptical elements, systems or apparatus4%
H05KPrinted circuits4%
G01JMeasurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light2%
G06FElectric digital data processing2%
H01FMagnets2%
H01LSemiconductor devices2%
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems2%
PatentTitleYear
12,581,223Optical path route design device and optical path route design method202612,563,323Wavelength cross connect device, and wavelength cross connect method202612,463,724Multipath interference analysis device and multipath interference analysis method202512,433,173Magnetic film, magnetoresistive effect element, and method for manufacturing magnetic film202512,316,383Wavelength cross connect device, multiband transmission system, and multiband transmission method202512,244,346Wavelength cross connect device and wavelength cross connect method202512,207,030Optical node device, optical transport network system, optical path trace method and program202511,979,226Wavelength cross connect device and wavelength cross connect method202411,888,408Power conversion device and manufacturing method of power conversion device202411,824,583Cyclic wavelength band replacement device, multi-band transmission system, and cyclic wavelength band replacement method202311,750,317Wavelength cross connect device and cross connect connection method202311,722,235Optical branch insertion device and optical branch insertion method202311,696,056Optical transmission system and optical transmission method202311,677,489Wavelength cross connect device, branch ratio variable method, and program202311,525,971Insertion/removal error prevention system202211,528,080Optical transmission system and failure diagnosis method for optical transmission system202211,424,824OSNR spectrum estimation apparatus, OSNR spectrum estimation method, and program2022Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2022–2026Patents assigned to NIPPON TELEGRAPH & TELEPHONE (13)· patent assignee history
2022–2026Based in JP· patent location history
2024Patents assigned to HITACHI ASTEMO LTD (1)· patent assignee history
2025–2026Patents assigned to NTT INC (3)· patent assignee history
2025Patents assigned to TDK CORP (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| NIPPON TELEGRAPH & TELEPHONE | 13 | 2022–2026 |
| NTT INC | 3 | 2025–2026 |
| HITACHI ASTEMO LTD | 1 | 2024 |
| TDK CORP | 1 | 2025 |
Locations
| Location | Patents | Span |
|---|---|---|
| JP | 17 | 2022–2026 |