Patents by Inventor Robert V. Charles

Robert V. Charles 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).

  • Vacuum forming apparatus
    Patent number: 5015167
    Abstract: An apparatus for a vacuum forming plastic sheets includes an upper member with a heater and a base member including a vacuum table. Guide rails extend between the upper member and the base member and confine a sheet-holding carrier for travel between the two members.
    Type: Grant
    Filed: April 21, 1989
    Date of Patent: May 14, 1991
    Assignee: Ron Charles & Associates
    Inventor: Robert V. Charles