Inventor
IZAWA TATSUO
JP7 patents
⚠️ This page may combine multiple inventors who share the name “IZAWA TATSUO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON TELEGRAPH & TELEPHONE
5 patentsUS5062680ANov 5, 1991
Plate plastics optical waveguide
NIPPON TELEGRAPH & TELEPHONE53 citations95
US4425146AJan 10, 1984
Method of making glass waveguide for optical circuit
NIPPON TELEGRAPH & TELEPHONE63 citations94
US4062665ADec 13, 1977
Continuous optical fiber preform fabrication method
NIPPON TELEGRAPH & TELEPHONE102 citations94
US3957474AMay 18, 1976
Method for manufacturing an optical fibre
NIPPON TELEGRAPH & TELEPHONE70 citations94
US4224046ASep 23, 1980
Method for manufacturing an optical fiber preform
NIPPON TELEGRAPH & TELEPHONE48 citations90
NTT ELECTRONICS CORP
2 patentsUS6885823B2Apr 26, 2005
Wavelength multiplexing/demultiplexing unit, wavelength multiplexing/demultiplexing apparatus and wavelength multiplexing/demultiplexing method
NTT ELECTRONICS CORP5 citations61
US6954562B2Oct 11, 2005
Matrix switch of optical waveguide type and method for manufacturing the same
NTT ELECTRONICS CORP0 citations41