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:
Nov. 16, 1999
Filed:
Aug. 26, 1997
Applicant:
Inventors:
Chyi-Yiing Wu, Taipei, TW;
Chih-Hsiung Lin, Taipei, TW;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01C / ; G01B / ;
U.S. Cl.
CPC ...
33227 ; 33286 ; 33DI / ; 33DI / ;
Abstract
A three-dimensional laser levelling and angle-calibrating instrument includes: a stand; a magnetically-attractive laser level having a horizontal bottom attractable on the stand, a vertical wall perpendicular to the horizontal bottom and a first laser illuminator mounted on the laser level for projecting a horizontal laser ray for levelling purpose; and a magnetically-attractive laser angle calibrator having a second laser illuminator and attracted on the vertical wall of the laser level for projecting a vertical laser light line for checking a verticality.