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, 2013
Filed:
Jun. 16, 2009
Mitsuo Takarada, Saitama, JP;
Mitsuo Takarada, Saitama, JP;
B & Plus K.K., Saitama, JP;
Abstract
There is provided a bidirectional transmission coil capable of miniaturizing a structure and carrying out reliable transmission of a data signal. A transmitting coil Lgenerates a magnetic flux of a transmission signal by a high frequency signal applied thereto. A receiving coil Lis arranged to be positioned concentrically with the transmitting coil L, for inducing a reception signal by the magnetic flux from outside. A first cancel coil Lac is connected to the transmitting coil Lin series so as to be led-out from a middle of the transmitting coil L and is led-in to the lead-out part. The first cancel coil Lac is arranged so as to sandwich the receiving coil Lbetween the first cancel coil Lac and the transmitting coil L, wherein the magnetic flux in a direction opposite to the magnetic flux from the transmitting coil Lis generated in the receiving coil L