When data is keyed in by operating a keyboard K displayed in a touch panel input area 14a, its character code is stored in a real data memory 46b of a RAM 23 and data on its attribute, pointer and data length is stored as management data. When handwritten data is input by manipulating a handwriting...http://www.google.de/patents/US5838302?utm_source=gb-gplus-sharePatent US5838302 - Data inputting devices for inputting typed and handwritten data in a mixed manner 
