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 |
