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:
Jun. 20, 2006
Filed:
Feb. 05, 2004
Applicants:
Shigeaki Sasaki, Hyogo-ken, JP;
Kenji Nishigaki, Hyogo-ken, JP;
Yasutaka Kanda, Hyogo-ken, JP;
Inventors:
Assignee:
Nabco Limited, Hyogo-Ken, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08B 13/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
A radio-wave transmitter-receiver section () forms a radio-wave detection zone () for detecting an object at a location way from a door (). A light emitter-receiver section () forms an optical detection zone () for detecting an object at a location along and closer to the door (). The light emitter-receiver section () includes mirrors () which are used to increase or decrease the depth dimension of the optical detection zone () in the direction perpendicular to the door ().