Patents Assigned to Mel A. Pfreizer
  • Knapsack-parka sleeping bag
    Patent number: 4103377
    Abstract: This invention reduces the weight and bulk of the hiker's backpack by eliminating the sleeping bag as a separate item. This is accomplished by providing insulating walls in the knapsack and providing the knapsack with a foldable insulating extension so that the insulated elongated knapsack can be attached to the bottom end of a parka to provide a continuous enveloping sleeping bag.
    Type: Grant
    Filed: January 27, 1977
    Date of Patent: August 1, 1978
    Assignee: Mel A. Pfreizer
    Inventors: James W. Mayer, Albert G. Smart