Patents by Inventor William David Marr

William David Marr 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).

  • Method of producing reinforced sheet material
    Patent number: 4051288
    Abstract: A method of producing a reinforced sheet by feeding a layer of foam material to a stitching machine at a rate greater than that at which the stitched material is produced by the machine. The stitching in the product is thus disposed below the surface of the foam and hence is not destroyed during subsequent flame-bonding.
    Type: Grant
    Filed: May 20, 1976
    Date of Patent: September 27, 1977
    Inventors: Alister Wilson, William David Marr, George Arthur Guild