Abstract: A mouthpiece type toothbrush comprises: a maxillary body part; a maxillary groove part formed at the maxillary body part to accommodate upper teeth; a maxillary outer rotation shaft configured with a plurality of straight shafts along an outside inner wall of the maxillary groove part; a maxillary inner rotation shaft configured with a plurality of straight shafts along an inside inner wall of the maxillary groove part; a maxillary third gear formed on any one straight shaft among the plurality of straight shafts configuring the maxillary outer rotation shaft; a shaft part having a screw thread; and a maxillary one-way bearing configured to rotate in one direction by a movement of the screw thread of the shaft part. The maxillary third gear rotates together with the rotation of the maxillary one-way bearing.

Abstract: A method of manufacturing a neutral and transparent metal oxide colloid solution containing dispersed titanium dioxide nano particles comprising the steps of (i) adding a titanium compound and a stabilizer to alcohol to produce a titanium-containing solution and (ii) neutralizing the titanium-containing solution of step (i) by adding a basic solution to produce a neutralized solution with the pH of the neutralized solution in a range of 6-8; and (iii) heating the neutralized solution at a temperature of above 75° C.

Abstract: The present invention discloses an image display apparatus using optical fiber in which moving images projected from a projector can be transferred to a screen through an optical fiber bundle with a high-definition image quality. An object of the present invention is to improve message transfer effect of various information pieces such as advertisement, by employing a connector which can selectively control a magnification of an image to be displayed while decreasing the sizes of a condensing member or a liquid crystal panel.

Abstract: The present invention relates to a method of manufacturing a neutral and transparent titanium dioxide colloid solution wherein titanium dioxide nano particles is dispersed, and a novel titanium dioxide colloid solution prepared by the method. In addition, the present invention relates to a multifunctional, normal temperature curing-type coating agent comprising the titanium dioxide colloid solution.