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:
Aug. 30, 1988
Filed:
Feb. 12, 1987
Hidekiyo Kushima, Kanagawa, JP;
Tsutomu Tanaka, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
In an IC card information reading and writing apparatus, a clock oscillator (4.9 MHz) is incorporated in the apparatus. Since the high-frequency clock is not passed through a cable connected between the apparatus and an external control unit, but supplied from the clock oscillator to the IC card via a short distance, the external control unit can stably control the IC card through the long cable without generating crosstalk or reflection. The clock signal is selectively supplied to the IC card via an AND gate in response to a clock-enable signal from the external control unit or a binary logic signal supply voltage for the reading and writing apparatus.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile