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.

Date of Patent:
Dec. 02, 1997

Filed:

Sep. 14, 1995
Applicant:
Inventors:

Yuji Ikeda, Tokyo, JP;

Takeshi Yamamoto, Kyoto, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01S / ;
U.S. Cl.
CPC ...
324652 ; 324655 ; 32420715 ; 273146 ; 2731 / ;
Abstract

An object has a plurality of parts, wherein each part of the plurality of parts can face a predetermined direction. A plurality of resonant circuits are mounted in different predetermined positions of the object, and have different resonance frequencies. A sending unit sends signals having a plurality of frequencies corresponding to the resonance frequencies of the plurality of resonant circuits. A detecting unit detects resonance signals of the plurality of resonant circuits. A plate has therein the sending unit and detecting unit. A determining unit determines a part of the object placed on the plate, the part facing the predetermined direction, using differences of detected levels of the resonance signals of the plurality of resonant circuits of the object detected by the detecting unit.


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