The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 02, 1985
Filed:
Oct. 25, 1982
Applicant:
Inventors:
Assignee:
Shiken, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A46B / ; A61N / ;
U.S. Cl.
CPC ...
604 20 ;
Abstract
A dental hygienic device comprising an n-type semiconductor disposed on or in a main body consisting of an inserting portion and a handle. At least one portion of the semiconductor is exposed while at least the other portion being located at the inserting portion of said main body. The semiconductor, when irradiated with a natural and/or man-made light, is activated to produce therein a number of holes whereas teeth becomes reverse-phased due to an electron density higher than that in the semiconductor to thereby give rise to a reduction which decompose tartars and colored scales on the teeth.