Patents by Inventor David W. Siitari

David W. Siitari 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).

  • Stable magneto optic recording medium
    Patent number: 4822675
    Abstract: Magneto-optic recording media have been made more resistant to corrosion by incorporating small amounts of tantalum and/or yttrium into the rare earth-transition metal active layer of the recording media. This improvement should help make magneto-optic media more reliable in the long term storage and retrieval of information.
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: April 18, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Arnold W. Funkenbusch, David W. Siitari