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:
Feb. 28, 2017
Filed:
Jun. 25, 2008
Masahiko Ando, Tochigi, JP;
Masahiko Ando, Tochigi, JP;
The Nippon Signal Co., Ltd., Tokyo, JP;
Abstract
A system that reads and writes information from and onto a non-contact information recording medium using an electric wave includes a reader/writer and a measuring unit. The reader/writer includes an antenna configured to transmit an electric wave onto the non-contact information recording medium, a demodulator configured to demodulate a reflected wave obtained by the non-contact information recording medium modulating a part of the electric wave, and a calculator configured to obtain a delay time of the reflected wave. The measuring unit measures a difference in delay times calculated by the calculator, and obtains a change in a distance between the antenna mediating transmission/reception of the electric wave and the non-contact information recording medium.