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Patent number 2,474,140. Page 1.

img792.jpg ThumbnailsPatent number 2,474,140.  Page 2.ThumbnailsPatent number 2,474,140.  Page 2.ThumbnailsPatent number 2,474,140.  Page 2.ThumbnailsPatent number 2,474,140.  Page 2.