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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Multiline slot machine
Patent number
RE34244
Issue date
May 11, 1993
Sigma Enterprises, Inc.
Takahashi Hagiwara
273 - Amusement devices: games
Information
Patent Grant
Roulette playing device
Patent number
4,989,873
Issue date
Feb 5, 1991
Sigma Enterprises, Incorporated
Katsuki Manabe
G07 - CHECKING-DEVICES
Information
Patent Grant
Roulette playing device
Patent number
4,906,005
Issue date
Mar 6, 1990
Sigma Enterprises, Incorporated
Katsuki Manabe
G07 - CHECKING-DEVICES
Information
Patent Grant
Roulette playing device
Patent number
4,869,505
Issue date
Sep 26, 1989
Sigma Enterprises, Incorporated
Katsuki Manabe
G07 - CHECKING-DEVICES
Information
Patent Grant
Multiline slot machine
Patent number
4,838,552
Issue date
Jun 13, 1989
Sigma Enterprises, Incorporated
Takashi Hagiwara
G07 - CHECKING-DEVICES
Information
Patent Grant
Slot machine
Patent number
4,805,907
Issue date
Feb 21, 1989
Sigma Enterprises, Incorporated
Takashi Hagiwara
G07 - CHECKING-DEVICES
Information
Patent Grant
Control device for game machine
Patent number
4,679,143
Issue date
Jul 7, 1987
Sigma Enterprises, Inc.
Takashi Hagiwara
G07 - CHECKING-DEVICES
Information
Patent Grant
Optoelectronic coin entry sensing system for coin operated machines
Patent number
4,565,275
Issue date
Jan 21, 1986
Sigma Enterprises Incorporated
Takashi Hagiwara
G07 - CHECKING-DEVICES
Patents Applications
last 30 patents
Trademark
last 30 trademarks
Information
Trademark
73493237 - SIGMA
Serial number
73493237
Registration number
1374884
Filing date
Aug 3, 1984
SIGMA ENTERPRISES, INC.
28 - Games and playthings
Information
Trademark
73403136 - SPIDERS
Serial number
73403136
Filing date
Nov 18, 1982
SIGMA ENTERPRISES, INC.
28 - Games and playthings