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:
Mar. 07, 1989
Filed:
Oct. 22, 1987
Applicant:
Inventor:
Kaoru Takahashi, Tokyo, JP;
Assignee:
Seiko Instruments Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K / ; H02H / ;
U.S. Cl.
CPC ...
235487 ; 235380 ; 361 91 ;
Abstract
A memory card for storing information having a shape similar to that of a credit card. The memory card includes a capacitor connected across power terminals of a RAM and a resistor connected between one power terminal of the RAM and an external terminal. A switch is connected in parallel with the resistor for short-circuiting the resistor. The switch is controlled in accordance with a signal from an external device. When the RAM is accessed by the external device, the switch is closed so that the impedance of the power supply line is decreased.