Inventor
UEMATSU YOSHIHIKO
JP9 patents
Patents
9 patentsUS6202082B1Mar 13, 2001
Trunk transmission network
NIPPON TELEGRAPH & TELEPHONE110 citations97
US5631896AMay 20, 1997
Hitless path switching apparatus and method
NIPPON TELEGRAPH & TELEPHONE71 citations94
US6598092B2Jul 22, 2003
Trunk transmission network
NIPPON TELEGRAPH & TELEPHONE28 citations92
US5751720AMay 12, 1998
Pointer processor and pointer processing scheme for SDH/SONET transmission system
NIPPON TELEGRAPH & TELEPHONE24 citations92
US7327676B2Feb 5, 2008
Data transmission control method, program therefor and data transmission unit using the same
NIPPON TELEGRAPH & TELEPHONE37 citations90
US11265628B2Mar 1, 2022
Optical transmission system and optical transmission method
NIPPON TELEGRAPH & TELEPHONE2 citations72
US6034974AMar 7, 2000
Channel-selection-type demultiplexing circuit
NIPPON TELEGRAPH & TELEPHONE5 citations62
US11362894B2Jun 14, 2022
Wiring management system and wiring management method
NIPPON TELEGRAPH & TELEPHONE0 citations51
US11251877B2Feb 15, 2022
Optical reception device
NIPPON TELEGRAPH & TELEPHONE0 citations51