Page:Gametronics Proceedings.djvu/31

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U. S. Patent
Nov. 23, 1976
Sheet 2 of 3
3,993,861
FIG. 2.
FIG. 2.

FIG. 2

FIG. 3.
FIG. 3.

FIG. 3

FIG. 4.
FIG. 4.

FIG. 4

–29–

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