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:
Apr. 16, 1991
Filed:
Mar. 03, 1989
Applicant:
Inventor:
Hendrik J de Jong, Groenlo, NL;
Assignee:
N.V. Nederlandsche Apparatenfabriek Nedap, De Groenlo, NL;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ; A01K / ;
U.S. Cl.
CPC ...
34082554 ; 119 5102 ;
Abstract
An electromagnetic detection system comprises a transmitter-receiver apparatus coupled to at least one antenna element to form an electromagnetic interrogation field in an interrogation zone defined at least in part by physical means. A plurality of responders is capable of generating a detectable signal under the influence of an interrogation field. According to the invention, at least one antenna element is a suitably formed structural element forming part of the physical means.