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:
Jun. 14, 1994
Filed:
Feb. 21, 1992
Seiki Nishi, Tokyo, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A memory card is provided having a memory, in which data entered through a plurality of data input-output terminals are written. The voltage of a backup battery for supplying the memory to preserve the data therein is compared with two different reference voltages so as to detect two binary battery check signals. When the memory card is loaded in an electronic device, one of the two battery check signals is outputted to the electronic device through one of the data input-output terminals, while the other battery check signal is outputted through a battery check terminal. Alternatively, both of the battery check signals are outputted through two of the data input-output terminals. The electronic device displays a condition of the backup battery by energizing green, yellow or red LEDs to emit light, in accordance with the battery check signals.