Matsushita patents granted on 12 January 2010

4 US patents granted on 12 January 2010 and assigned to Matsushita

1 7,646,359 Flat display unit and method for converting color signal in the unit
2 7,646,117 Actuator and electric toothbrush using the same
3 7,645,631 Method of manufacturing organic EL display
4 7,644,511 Heating and blowing apparatus