[21] Appl. No.: 499,418
[22] Filed: Jul. 7,1995
[51] Int. CI.6 A63F 3/06; G06F 15/44
[52] U.S. CI 273/269; 463/19; 463/16
[58] Field of Search 463/16, 19, 29,
463/30-31, 40-42; 364/410, 412, 471, 478, 479; 283/49, 903; 273/237, 269, 139,
274
[56] References Cited
U.S. PATENT DOCUMENTS
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4,373,726 2/1983 Churchill et al 463/29
4,624,462 11/1986 Itkis 273/269
4,661,906 4/1987 DiFrancesco et al 273/269
4,669,729 6/1987 Solittetal 463/29
4,830,380 5/1989 Six 273/269
4,856,787 8/1989 Itkis 273/269
4,875,686 10/1989 Tiinms 273/269
4,882,688 11/1989 Kondziolka et al 273/269
4,885,700 12/1989 Kondziolka et al 273/269
4,909,516 3/1990 Kolinsky 463/19
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