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:
Mar. 12, 2019
Filed:
Mar. 03, 2017
National Taiwan Normal University, Taipei, TW;
National Taiwan Normal University, Taipei, TW;
Abstract
A measurement tool for circumference includes at least one disk with a circumference thereof provided with a through hole; a straightedge provided with a fixed post and a plurality of scales, and the fixed post penetrates through the through hole to fix the disk to the fixed post; and a hitching line with one end thereof penetrated by the fixed post, and the other end of the hitching line surrounds the disk or straightens along the straightedge. Thus, a string makes a circle around the circumference, whereby the string is marked an index corresponding to the fixed post, and then the string straightens along the straightedge, and a length of the circumference of the disk is obtained according to relative positions of the scales and the index.