Patents by Inventor Mark A. Landgrebe

Mark A. Landgrebe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5493874
    Abstract: A portable, insulated carrying chest having both hot and cold compartments. Two separate, insulated compartments are provided within a receptacle. Each compartment has its own cover, so that when one compartment is opened, the other is not disturbed, and heat transfer therebetween is minimized. One compartment has a chilling medium, such as a commercially available frozen, enclosed medium. The other compartment has a heating medium, such as a commercially available heating pack comprising a material which emits heat spontaneously upon being exposed to air. Metal carriers are provided for holding two such heating packs against opposing walls of the hot compartment.
    Type: Grant
    Filed: March 10, 1994
    Date of Patent: February 27, 1996
    Inventor: Mark A. Landgrebe