Patents by Inventor Erick E. Hagstrom

Erick E. Hagstrom 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).

  • Ribbon roll drive
    Patent number: 5326182
    Abstract: A motor and drive mechanism having a drive hub which positively locks to a core for a ribbon roll, and a drag hub which also positively locks to a core for a ribbon roll. A ribbon roll has a core formed of concentric cylindrical shells separated from one another with a ribbon wound about the outer shell and one or more coding marks are provided on this shell to indicate both the printer control system and, to a visual observer, information specific to the ribbon.
    Type: Grant
    Filed: September 14, 1992
    Date of Patent: July 5, 1994
    Assignee: Datamax Bar Code Products Corporation
    Inventor: Erick E. Hagstrom