Inventor
KUMOZAKI KIYOMI
JP9 patents
Patents
9 patentsUS5608565AMar 4, 1997
Bidirectional optical transmission system
NIPPON TELEGRAPH & TELEPHONE59 citations95
US5539564AJul 23, 1996
Point-to-multipoint optical transmission system
NIPPON TELEGRAPH & TELEPHONE79 citations92
US5812667ASep 22, 1998
Subscriber registration and authentication method
NIPPON TELEGRAPH & TELEPHONE38 citations91
US5646758AJul 8, 1997
Optical time compression multiplexing transmission system
NIPPON TELEGRAPH & TELEPHONE19 citations91
US5204903AApr 20, 1993
Secure communication equipment and secure transmission system
NIPPON TELEGRAPH & TELEPHONE31 citations89
US5896216AApr 20, 1999
AM/PM converter and optical signal transmission system
NIPPON TELEGRAPH & TELEPHONE29 citations87
US4984262AJan 8, 1991
Digital service unit
NIPPON TELEGRAPH & TELEPHONE10 citations71
US5668652ASep 16, 1997
Optical WDM (wavelength division multiplexing) transmission system and method for configuring the same
NIPPON TELEGRAPH & TELEPHONE14 citations68
US7698290B2Apr 13, 2010
Error correction method and apparatus
NIPPON TELEGRAPH & TELEPHONE1 citations50