TODAY’S PATENT- TOOTH BRUSH
In today’s patent, we will discuss Beach D. Raymond (Atami-shi, Shizuoka-pref)’s invention, “TOOTH BRUSH” (US4519109A), which was patented by the USPTO on May 28, 1985.
The following invention is generally invented for an improved version of a tooth brush for keeping users’ decayed teeth. The invention further involves a construction wherein the grip portion of tooth brush shank is provided with a projection which is adapted to press against the portions thereby enabling users to perceive the seat of gingivitis at an earlier stage by feeling pain when the projection is applied to their gingivitis portion. Accordingly the present invention has been devised to eliminate or mitigate all the above-mentioned drawbacks and disadvantages of the conventional types, and has for one of its main objects provision of a tooth brush which it is easy for users not only to clean the rows and casing of their teeth but also to massage their portions. The major object of the invention is to provide a tooth brush which has a shank provided in an extremity thereof with a projection in integral relation so that merely by abutting the same projection against each of users’ portions, they can perceive whereabouts of gingivitis going on, thus being able to undergo dental treatment at an earlier stage.