Mattress with a Concavity for the Breasts
Inventor Allyn, Timothy James
Patent No 6,052,847
Filed 28 April 1998
Awarded 25 April 2000
A mattress having a wedge-shaped mattress body with an inclined upper surface, the upper surface divided by a transverse breast concavity into a head-supporting portion and a body-supporting portion. More here.