Patents Assigned to Marumanji Sangyo Co., Ltd.
  • Cushion with heating pad
    Patent number: 4995126
    Abstract: A cushion using disposable heat pads. A ventilated outer bag contains in its interior, a sheet having at its upper side a recessed air passage, disposable heat pads containing powders such as of oxidized metal and water-containing material, and a cushion, which are put in layers in this order from the lower side of the bag. The disposable heat pads are well ventilated from the air passage of the sheet laid thereunderneath, so that the heating effect can be improved.
    Type: Grant
    Filed: April 23, 1990
    Date of Patent: February 26, 1991
    Assignee: Marumanji Sangyo Co., Ltd.
    Inventor: Toshihiko Matsuda