Patents by Inventor Langdon DuBois

Langdon DuBois 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).

  • Fan with cross-bar holding arm
    Patent number: 6793460
    Abstract: The present invention is directed to fans having a handle that is disposed in a non-radial manner with respect to the center of the fan portion. In preferred embodiments the handle is substantially parallel to an imaginary circumferential tangent of the fan. In an especially preferred embodiment the fan is expanded at two radial spokes. Each of the spokes has a distal end, and the two distal ends are used to support the handle. An angle formed between the two spokes when the fan is in the expanded configuration is at least 15 degrees.
    Type: Grant
    Filed: August 13, 2002
    Date of Patent: September 21, 2004
    Inventor: Langdon DuBois
  • Fan with cross-bar holding arm
    Publication number: 20030108421
    Abstract: The present invention is directed to fans having a handle that is disposed in a non-radial manner with respect to the center of the fan portion. In preferred embodiments the handle is substantially parallel to an imaginary circumferential tangent of the fan. In an especially preferred embodiment the fan is expanded at two radial spokes. Each of the spokes has a distal end, and the two distal ends are used to support the handle. An angle formed between the two spokes when the fan is in the expanded configuration is at least 15 degrees.
    Type: Application
    Filed: August 13, 2002
    Publication date: June 12, 2003
    Inventor: Langdon DuBois