Inventor
USUBA KEIJI
JP8 patents
⚠️ This page may combine multiple inventors who share the name “USUBA KEIJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
4 patentsUS6614754B1Sep 2, 2003
Bi-directional line switched ring network system
HITACHI LTD45 citations89
US7724724B2May 25, 2010
Radio communication apparatus
HITACHI LTD10 citations83
US7184661B1Feb 27, 2007
Transmission equipment for network and network transmission system
HITACHI LTD7 citations69
US7054334B2May 30, 2006
Pathsize control method and operation of transmission apparatus
HITACHI LTD2 citations58