A tooth brush comprises a plurality of tufts each of which comprises a plurality of bristles embedded respectively in bored holes which are vertically and laterally formed in a head portion of the toothbrush. The tufts each comprises first and second bristles, such that in each of the tufts, the total...http://www.google.se/patents/US6044514?utm_source=gb-gplus-sharePatent US6044514 - Toothbrush
