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:
Apr. 01, 1986
Filed:
Apr. 28, 1983
Applicant:
Inventor:
Mamoru Imaizumi, Nagoya, JP;
Assignee:
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365229 ; 365195 ;
Abstract
An electronic apparatus comprising a memory and a memory backup power source for supplying power to the memory when normal power supply to the apparatus is interrupted; wherein after resumption of normal power supply to the apparatus, and error signal is generated when the voltage of the memory backup power source is below a predetermined value, indicating that the content of the memory is not reliable. Circuitry to inhibit recharging of the backup power source and prevent read/write operations during the voltage checking period is also included.