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:
Feb. 16, 1988
Filed:
May. 30, 1986
Yasuteru Eguchi, Utsunomiya, JP;
Satoshi Tsujita, Utsunomiya, JP;
Kao Corporation, Tokyo, JP;
Abstract
A toothbrush capable of removing the sordes from the teeth excellently, and massaging the gums effectively without paining or hurting the same. The toothbrush has a handle, and bristles implanted into the handle, characterized in that all of the bristles have spherical portions formed at the free ends thereof, these bristles consisting of bristles of not less than two kinds of lengths, a difference between the length of the longest bristles and that of the shortest bristles being within the range of 1-4 mm, the bristles being arranged in such an implantation pattern that the bristles of an equal length do not gather locally so as to prevent the spherical portions thereof from contacting one another, whereby these bristles are not bent outward.