Inventor
IITAKA TAKESHI
JP2 patents
Patents
2 patentsUS7664518B2Feb 16, 2010
Group call server, group call system, terminal, and group call control method
NTT DOCOMO INC1 citations45
US7864934B2Jan 4, 2011
Telephone used in a telephone system for transmitting data from an authorized telephone with speech authority to an unauthorized telephone without speech authority
NTT DOCOMO INC0 citations31