Inventor
ESAKI TOMOHIRO
JP7 patents
Patents
7 patentsUS5740369AApr 14, 1998
Information delivery system and portable information terminal
HITACHI LTD99 citations95
US5131032AJul 14, 1992
Echo canceller and communication apparatus employing the same
HITACHI LTD68 citations95
US5754629AMay 19, 1998
Information processing system which can handle voice or image data
HITACHI LTD46 citations91
US6928306B2Aug 9, 2005
Portable mobile unit
HITACHI LTD34 citations90
US5361047ANov 1, 1994
PI/4 shift QPSK modulator and communication apparatus used therewith
HITACHI LTD13 citations73
US7177960B2Feb 13, 2007
Mobile terminal
HITACHI LTD5 citations62
US6285982B1Sep 4, 2001
Sound decompressing apparatus providing improved sound quality during special reproducing such as forward search reproducing and reverse search reproducing
HITACHI LTD5 citations57