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:
Dec. 11, 2007
Filed:
Oct. 22, 2002
Yuichiro Nakai, Kobe, JP;
Shota Nakashima, Hirakata, JP;
Yuichiro Nakai, Kobe, JP;
Shota Nakashima, Hirakata, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
To provide a contactless communication system that can reduce a time required to complete an identification of all data carriers that exist around a reader/writer and thus attempt to speed up its processing. According to the contactless communication system, multiple data carriers detect a response requesting command from an access device and send back an individual response signal for one-bit information to the access device at a time that is ordered based on a portion of each carrier's identification information, and the access device monitors individual slots for the response signals and determines that detection of the presence of data carriers is completed when it has obtained individual signals from the data carriers, thereby reducing the time required to complete the identification of all data carriers.