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. 03, 2009
Filed:
May. 26, 2006
Applicants:
William Hersey, Corte Madera, CA (US);
William H. Baylis, Tiburon, CA (US);
Yongxin Luo, San Francisco, CA (US);
Inventors:
William Hersey, Corte Madera, CA (US);
William H. Baylis, Tiburon, CA (US);
Yongxin Luo, San Francisco, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01C 15/00 (2006.01); G01B 11/26 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides apparatus and a method for projecting an indication of alignment. The invention features forming a first output beam, and a second output beam that is substantially perpendicular to the first output beam. The first output beam indicates level, the second output beam indicates plumb, and the first and second output beams together indicate square.