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. 06, 1986
Filed:
Nov. 09, 1983
Applicant:
Inventor:
Yuichi Saitoh, Tokyo, JP;
Assignee:
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365229 ; 365226 ; 371 66 ;
Abstract
A cassette type semiconductor memory device is provided with a RAM and a back-up battery within a cassette, with a connector connected to the main frame of a data processor. The RAM and its periphery circuit, as well, are backed up by the battery. The live-line insertion/removal of the memory pack is detected by monitoring the power source voltage. At this time, memory access is prohibited. Further, flow of current from the main frame into the power source line is prevented.
Saitoh, Yuichi. (1986). Cassette type semiconductor memory device (U.S. Patent No. 4587640). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4587640
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile