Patents by Inventor Keith R. Mardak

Keith R. Mardak 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: 4709895
    Abstract: A portable collapsible apparatus for supporting material such as sheet music to be viewed by an individual without the need for the viewing individual to support the article by hand. The apparatus includes a plurality of pivotally connected rigid members which are pivotable about a plurality of parallel spaced apart axes. The material extends from a forward edge to a free edge with a transverse stop provided at the forward edge. The rigid members are sized such that the free edge is pivotable to a position opposing the stop with a support surface projecting away from the stop at an inclined angle to support the article to be viewed.
    Type: Grant
    Filed: January 30, 1987
    Date of Patent: December 1, 1987
    Assignee: Hal Leonard Publishing Corporation
    Inventor: Keith R. Mardak