Number | Name | Date | Kind |
---|---|---|---|
3822876 | Frain | Jul 1974 | |
4630830 | Gadd | Dec 1986 | |
4661906 | DiFrancesco et al. | Apr 1987 | |
4669729 | Solitt et al. | Jun 1987 | |
4830380 | Six | May 1989 | |
4845739 | Katz | Jul 1989 | |
4882688 | Kondziolka et al. | Nov 1989 | |
4909516 | Kolinsky | Mar 1990 | |
5035422 | Berman | Jul 1991 | |
5072381 | Richardson et al. | Dec 1991 | |
5083272 | Walker et al. | Jan 1992 | |
5112050 | Koza et al. | May 1992 |
Number | Date | Country |
---|---|---|
1215431 | Dec 1986 | CAX |
0310368 | Apr 1989 | EPX |
WO9106354 | May 1991 | WOX |
2136303 | Sep 1984 | GBX |
2197971 | Jun 1988 | GBX |
2214823 | Sep 1989 | GBX |
Entry |
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"MegaBingo" Advertisement, Gamma International Ltd., Feb. 1989. |