Assignee
SIGMA ENTERPRISES INC
JP·11 granted patents·2,290 citations·filing 1983–1989
Top patents by PatentIndex Score
11 records- 0198US4805907ASlot machineSIGMA ENTERPRISES INC·Filed 1986·Granted Feb 21, 1989·1k cites·6 claims
- 0297US4838552AMultiline slot machineSIGMA ENTERPRISES INC·Filed 1988·Granted Jun 13, 1989·532 cites·2 claims
- 0397US4679143AControl device for game machineSIGMA ENTERPRISES INC·Filed 1983·Granted Jul 7, 1987·380 cites·8 claims
- 0492US4906005ARoulette playing deviceSIGMA ENTERPRISES INC·Filed 1987·Granted Mar 6, 1990·207 cites·10 claims
- 0586US4869505ARoulette playing deviceSIGMA ENTERPRISES INC·Filed 1987·Granted Sep 26, 1989·66 cites·27 claims
- 0676US4989873ARoulette playing deviceSIGMA ENTERPRISES INC·Filed 1989·Granted Feb 5, 1991·30 cites·19 claims
- 0751US4643228AConvertible high or low pressure pilot valveSIGMA ENTERPRISES INC·Filed 1984·Granted Feb 17, 1987·15 cites·17 claims
- 0850US4565275AOptoelectronic coin entry sensing system for coin operated machinesSIGMA ENTERPRISES INC·Filed 1983·Granted Jan 21, 1986·11 cites·6 claims
- 0947US4645431AHydraulic pumping apparatus and method of operationSIGMA ENTERPRISES INC·Filed 1986·Granted Feb 24, 1987·16 cites·11 claims
- 1041US4768373ACorrosion and erosion sensorSIGMA ENTERPRISES INC·Filed 1987·Granted Sep 6, 1988·9 cites·20 claims
- 1133US5013218ASubmersible pneumatic pump for water tableSIGMA ENTERPRISES INC·Filed 1988·Granted May 7, 1991·5 cites·38 claims
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