Fig. 1. Graph of patent for toothbrush bristle
Fig. 2. Graph of patent for additional function
Fig. 3. Graph of patent for electronic toothbrush
Fig. 4. Graph of patent for toothbrush‘s head
Fig. 5. Graph of patent for toothbrush in different form
Fig. 6. Graph of patent for toothbrush‘s neck
Fig. 7. Graph of patent for learning of brushing habits
Fig. 8. Graph of patent for toothbrush‘s handle
Fig. 9. Result of annual patent analysis
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