Inventor
OTSUBO TADASU
JP4 patents
Patents
4 patentsUS6249532B1Jun 19, 2001
Interactive chargeable communication system with billing system therefor
HITACHI LTD101 citations97
US6002694ADec 14, 1999
Interactive chargeable communication system with billing system therefor
HITACHI LTD77 citations95
US5307171AApr 26, 1994
Video tape recorder/player
HITACHI LTD24 citations92
US5122885AJun 16, 1992
Magnetic video recording/reproducing apparatus for video signals of different aspect ratios adapter unit
HITACHI LTD35 citations92