Patents by Inventor Hannu Hakonen

Hannu Hakonen 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).

  • Patent number: D289433
    Type: Grant
    Filed: October 22, 1985
    Date of Patent: April 21, 1987
    Assignee: Suomen Vuolukivi Oy
    Inventor: Hannu Hakonen