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:
May. 02, 1989
Filed:
Mar. 08, 1988
Yasuo Uchida, Takatsuki, JP;
Hisato Fujisaka, Kyoto, JP;
Omron Tateisi Electronics Co., Kyoto, JP;
Abstract
An ID system includes a data carrier attached to an article to be identified, and an ID controller capable of communicating with the data carrier. The data carrier is provided with first and second data buffers in addition to a readable/writable memory. Data to be written in the memory is temporarily written in the first data buffer. Old data at a location of the memory in which the aforementioned data is to be written is read out of the memory and temporarily stored in the second data buffer. Thereafter, the data in the first data buffer is written in the memory. In order to check whether the data has been written in the memory correctly, the written data is read out of the memory. In the event that a write error is detected in the checking operation, the old data of memory will have been preserved in the second data buffer, thereby enabling recovery of the old data.