Patents by Inventor Robert L. Hagerman

Robert L. Hagerman 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).

  • Railroad tie pad
    Patent number: 5730357
    Abstract: A railroad tie pad comprises a hard polymer frame which defines a central cavity. An elastomeric insert fills the cavity and is secured to the frame. One side of the frame is wider than an opposing side.
    Type: Grant
    Filed: October 3, 1996
    Date of Patent: March 24, 1998
    Assignee: Airboss of America Corp.
    Inventors: Viktor Besenschek, Robert L. Hagerman
  • Composite tire and tire element
    Patent number: D371143
    Type: Grant
    Filed: August 19, 1994
    Date of Patent: June 25, 1996
    Assignee: Airboss of America Corp.
    Inventor: Robert L. Hagerman