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. 07, 2007
Filed:
Dec. 19, 2003
Applicant:
Reza Miremadi, West Hills, CA (US);
Inventor:
Reza Miremadi, West Hills, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J 1/00 (2006.01); G01J 1/36 (2006.01);
U.S. Cl.
CPC ...
Abstract
A door obstacle sensor in which an optical transmitter and a receiver are located on the same side of an entranceway, and a retroreflector is placed on the opposite side. A controller measures the time of flight of a light beam that is reflected from the retroreflective target. All future target distances are compared to the initial distance, and a decision is made as to an object being present in or absent from the entranceway.