Patent ID: 7930784

Claim:
An infant mattress comprising a single piece three-dimensional body with elastic properties and a textile case encasing said body, wherein said body has a top view of a rectangle, a curved top surface, a planar bottom surface located opposite of said curved top surface, a pair of identical longitudinal side surfaces paralleling to each other, and two latitudinal side surfaces paralleling to each other, wherein each of said longitudinal side surfaces comprises a curved top line, a first vertical line, a horizontal bottom line and a second vertical line paralleling to said first vertical line, said bottom line being connected to said first vertical line's and said second vertical line's lower ends respectively, said curved top line being connected to said first vertical line and said second vertical line's upper ends respectively, wherein said curved top line comprises a sine wave and a tail line segment, said sine wave comprising one crest segment and one trough segment only, said tail line segment being connected to an end of said trough segment, and wherein said curved top surface is formed by a translational motion of said curved top line along said rectangle's latitudinal direction for a distance of said rectangle's width.