Inventor
YOTSUTANI AKIO
JP17 patents
⚠️ This page may combine multiple inventors who share the name “YOTSUTANI AKIO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON TELEGRAPH & TELEPHONE
10 patentsUS4679244AJul 7, 1987
Method of transmitting terminating call signals within a restricted duration and a base station and a portable unit for use in the same
NIPPON TELEGRAPH & TELEPHONE153 citations97
US4736461AApr 5, 1988
Method of transmitting terminating call signals within a restricted duration and a base station and a portable unit for use in the same
NIPPON TELEGRAPH & TELEPHONE60 citations95
US5140628AAug 18, 1992
Radio telephone system control method
NIPPON TELEGRAPH & TELEPHONE22 citations92
US4802200AJan 31, 1989
Radio telephone system control apparatus and method
NIPPON TELEGRAPH & TELEPHONE38 citations92
US4776001AOct 4, 1988
Radio telephone system control apparatus and method
NIPPON TELEGRAPH & TELEPHONE32 citations92
US4726052AFeb 16, 1988
Radio telephone system and method for controlling same
NIPPON TELEGRAPH & TELEPHONE25 citations92
US4962524AOct 9, 1990
Cordless telephone apparatus and a method of controlling same
NIPPON TELEGRAPH & TELEPHONE21 citations81
US4897864AJan 30, 1990
Control method and appartus for a radio telephone system
NIPPON TELEGRAPH & TELEPHONE16 citations73
US4802201AJan 31, 1989
Control system of a radio telephone apparatus
NIPPON TELEGRAPH & TELEPHONE16 citations72
US4974251ANov 27, 1990
Cordless telephone system
NIPPON TELEGRAPH & TELEPHONE15 citations71
NEC CORP
5 patentsUS4640986AFeb 3, 1987
Mobile radio communication system
NEC CORP80 citations95
US4875231AOct 17, 1989
Radio telephone system
NEC CORP82 citations94
US4656653AApr 7, 1987
Cordless telephone apparatus having means for synchronizing channel scanning of fixed and portable units
NEC CORP44 citations92
US4843622AJun 27, 1989
Communication control system capable of searching a called telephone set in a mobile radio telephone network
NEC CORP44 citations90
US5239572AAug 24, 1993
Cordless key telephone system capable of quickly answering incoming calls
NEC CORP48 citations89