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. 15, 2004
Filed:
Mar. 22, 2002
Applicant:
Inventors:
Andreas Hofmann, Bünde, DE;
Matthias Krühler, Bückeburg, DE;
Assignee:
Bernstein AG, Porta Westfalica, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R / ; H01F 5/00 ;
U.S. Cl.
CPC ...
G01R / ; H01F 5/00 ;
Abstract
Inductive safety sensor for monitoring the condition of doors and gates, particularly of elevators, having a sensor device for sensing a target which is designed such that it emits a signal only when sensing a target made of a defined material and switches from a first constant current to another constant current when the target is sensed.