Assignee
SIGMA INC
JP13 patents
Top patents by PatentIndex Score
US5580055ADec 3, 1996
Amusement device and selectively enhanced display for the same
SIGMA INC403 citations99
US5192076AMar 9, 1993
Keno game playing apparatus
SIGMA INC154 citations99
US5209479AMay 11, 1993
Clot machine
SIGMA INC339 citations98
US5423539AJun 13, 1995
Slot machine with payout modifying symbols
SIGMA INC596 citations97
US5050881ASep 24, 1991
Slot machine
SIGMA INC134 citations96
US5713572AFeb 3, 1998
Pusher game apparatus
SIGMA INC33 citations93
US5591081AJan 7, 1997
Card game amusement device
SIGMA INC57 citations93
US5507490AApr 16, 1996
Game apparatus
SIGMA INC37 citations93
US6012981AJan 11, 2000
Game machine for single player
SIGMA INC134 citations89
US4874172AOct 17, 1989
Reel tare fixing device and reel
SIGMA INC8 citations70
US4928964AMay 29, 1990
Reel driving device for use in the slot machine
SIGMA INC4 citations59
US5382021AJan 17, 1995
Horse racing game having rotating arm and tethered members
SIGMA INC7 citations58
US5618233AApr 8, 1997
Running body and racing game apparatus using the same
SIGMA INC5 citations52