Patents by Inventor David G. Littlejohn

David G. Littlejohn 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).

  • Carpet machine
    Patent number: 3939030
    Abstract: Method and apparatus to produce a bonded loop pile carpet. The carpet machine is of the rotary type which uses cooperating notched blade members which are shogged to form the yarn loops for bonding to a backing sheet. One set of the blade members is reciprocably mounted in the rotor of the machine.
    Type: Grant
    Filed: July 8, 1974
    Date of Patent: February 17, 1976
    Assignee: Deering Milliken Research Corporation
    Inventors: Charles A. Wethington, David G. Littlejohn