Patents by Inventor Steven D. Hartman

Steven D. Hartman 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 and apparatus for cutting of flexible foam material
    Patent number: 4621956
    Abstract: An apparatus and process for the continuous cutting of a generally cylindrical rod from soft flexible polymeric foam slabs is disclosed.
    Type: Grant
    Filed: October 1, 1984
    Date of Patent: November 11, 1986
    Inventors: Steven D. Hartman, H. David Hartman