Patents Assigned to Japan Life Company Limited
  • Sleeping mattress
    Patent number: 4509219
    Abstract: A sleeping mattress comprises in order a first layer made of cushion material formed with wave-like projections, a second layer having semi-circular projections provided with permanent magnets, a third layer stuffed with palm fibers and reinforcing materials, and a fourth layer composed of cushion materials. A magnetic curing effect by the magnets and a spine balancing effect by moderate hardness are obtained during sleeping, and comfortable sleeping may be achieved.
    Type: Grant
    Filed: October 12, 1983
    Date of Patent: April 9, 1985
    Assignee: Japan Life Company Limited
    Inventor: Toshizo Yagi