Patents by Inventor Jan Häfner

Jan Häfner 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).

  • Spool
    Patent number: D654981
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: February 28, 2012
    Assignee: Häfner & Krullmann GmbH
    Inventor: Jan Häfner
  • Spool
    Patent number: D655369
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: March 6, 2012
    Assignee: Häfner & Krullman GmbH
    Inventor: Jan Häfner