Patents by Inventor Per Olof G. Risman

Per Olof G. Risman 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).

  • Microwave heating device
    Patent number: 7528353
    Abstract: A microwave heating device for heating load(s) and including a cylinder-shaped cavity enclosed by a periphery wall, the cavity is provided with a microwave feeding device. The heating device may have a dielectric wall structure arranged inside the cavity between the periphery wall and the load(s). The microwave feeding device may be arranged to generate a microwave field being an arch surface hybrid mode having TE and TM type properties inside the cavity to heat the load(s).
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: May 5, 2009
    Assignee: Biotage AB
    Inventors: Per Olof G. Risman, Magnus Fagrell, Fredrik Stillesjö