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:
Aug. 29, 2000
Filed:
Mar. 18, 1998
Chyi-Yiing Wu, Taipei, TW;
Lin Chin Hsiung, Taipei, TW;
Other;
Abstract
An automatic optical plumbing instrument includes: an objective telescopically mounted at a front portion of a telescopic housing adjacent to an object to be observed, an ocular telescopically mounted at a rear portion of the housing adjacent to an observer's eye, and a transparent plumbing protractor defining a plumbing line thereon and mounted in the housing between the objective and the ocular, whereby upon entrance of a vertical line (or plane) of the object into the instrument to form an image therein, a verticality of the vertical line (or plane) of the object can be checked whether the vertical line is aligned with the plumbing line marked on the protractor, thereby providing a plumbing instrument for calibrating a verticality of the object.