Inventor

KAWAHARA HIROKI

JP23 patents

⚠️ This page may combine multiple inventors who share the name “KAWAHARA HIROKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

KAWAHARA HIROKI

NIPPON TELEGRAPH & TELEPHONE

Wavelength cross connect device, multiband transmission system, and multiband transmission method

Wavelength cross connect device and wavelength cross connect method

Optical transmission system and optical transmission method

Wavelength cross connect device and wavelength cross connect method

Wavelength cross connect device and cross connect connection method

Optical node device, optical transport network system, optical path trace method and program

Optical branch insertion device and optical branch insertion method

Wavelength cross connect device, branch ratio variable method, and program

Optical transmission system and failure diagnosis method for optical transmission system

OSNR spectrum estimation apparatus, OSNR spectrum estimation method, and program

Wiring management system and wiring management method

Optical reception device

Cyclic wavelength band replacement device, multi-band transmission system, and cyclic wavelength band replacement method

Optical cross-connect device, optical transmission system, and optical transmission line connection error detection method

Optical transmission system and optical transmission method

PANASONIC IP MAN CO LTD

Demand responsive operation system

Information management device, vehicle, and information management method

TLV CO LTD

Threshold value calculation system, and threshold value calculation method

Maintenance support system and maintenance support method

NTT INC

Wavelength cross connect device, and wavelength cross connect method

Multipath interference analysis device and multipath interference analysis method

FUJITSU LTD

Information transfer system

MITSUBISHI CHEM CORP

Process for producing (meth)acrolein or (meth)acrylic acid