Inventor
NISHIZAWA HIDEKI
JP21 patents
⚠️ This page may combine multiple inventors who share the name “NISHIZAWA HIDEKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON TELEGRAPH & TELEPHONE
12 patentsUS11546064B2Jan 3, 2023
Optical transmission system and transmission mode selecting method
NIPPON TELEGRAPH & TELEPHONE4 citations73
US11979694B2May 7, 2024
Optical and electronic integrated switch
NIPPON TELEGRAPH & TELEPHONE2 citations72
US11930309B2Mar 12, 2024
Optical and electronic integrated switch
NIPPON TELEGRAPH & TELEPHONE2 citations72
US11881897B2Jan 23, 2024
Optical and electronic integrated switch and optical network system
NIPPON TELEGRAPH & TELEPHONE2 citations72
US11342990B2May 24, 2022
State estimating device and communication system
NIPPON TELEGRAPH & TELEPHONE2 citations70
US12107762B2Oct 1, 2024
Optical and electronic integrated switch
NIPPON TELEGRAPH & TELEPHONE0 citations51
US12034484B2Jul 9, 2024
Optical communication network management apparatus
NIPPON TELEGRAPH & TELEPHONE0 citations51
US11799547B2Oct 24, 2023
Signal processing apparatus, signal processing method, and program
NIPPON TELEGRAPH & TELEPHONE0 citations51
US11165497B2Nov 2, 2021
Optical transmission system and communication condition selection method
NIPPON TELEGRAPH & TELEPHONE0 citations50
US12407755B2Sep 2, 2025
Communication system, computing machine, communication method and program
NIPPON TELEGRAPH & TELEPHONE0 citations48
US12363192B2Jul 15, 2025
Communication system, computing machine, communication method and program
NIPPON TELEGRAPH & TELEPHONE0 citations48
US12341673B2Jun 24, 2025
Communication apparatus, relay apparatus, communication system, communication method, and program
NIPPON TELEGRAPH & TELEPHONE0 citations47
NTT INC
6 patentsUS12457040B2Oct 28, 2025
Optical transmission system and transmission mode selecting method
NTT INC0 citations61
US12513047B2Dec 30, 2025
Connection optimization device, connection optimization method, and program
NTT INC0 citations59
US12483622B2Nov 25, 2025
Intermediate apparatus, communication method, and program
NTT INC0 citations58
US12512972B2Dec 30, 2025
Quantum key distribution system, quantum key distribution method and quantum key distribution program
NTT INC0 citations52
US12574666B2Mar 10, 2026
Connection node apparatus, optical transmission system, and connection method
NTT INC0 citations51
US12538052B2Jan 27, 2026
Optical transport system, orchestrator, control method, and storage medium of control program
NTT INC0 citations48