Inventor

HIROTA HIDENOBU

JP20 patents

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

HIROTA HIDENOBU

NIPPON TELEGRAPH & TELEPHONE

Optical fiber side input/output device and design method

Optical pulse testing device and optical pulse testing method

Termination determination device and termination determination method

Cable towing machine and cable laying method

Optical fiber display system and optical fiber switching method

Judgment device and judgment method

Optical multiplexing/demultiplexing method, optical multiplexing/demultiplexing circuit, and manufacturing method thereof

Optical network system, operating method of optical network system, and optical line terminator

Optical fiber lateral input/output device

Optical fiber lateral input/output device

Optical fiber side input and output device

Communication apparatus identification device, optical fiber connection system, communication apparatus identification method, and optical fiber connection method

Simulation signal light generation device and simulation signal light generation method

Optical frequency multiplexing coherent OTDR, testing method, signal processing device, and program

Communication monitor method and communication monitor device

Optical fiber lateral input/output device

Danger prediction method and danger prediction device

Manufacturing method and manufacturing apparatus of optical splitters

NTT INC

Optical coupling device and optical coupling system

Branch ratio measuring device, branch ratio measuring method, and optical multiplexing/demultiplexing circuit manufacturing method