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:
Nov. 03, 1987
Ryozo Touji, Tenri, JP;
Souichi Ohnishi, Yao, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
An electronic cash register (ECR) comprising a memory containing addresses identical to those of the mask ROM that permanently stores a variety of trade processing programs and stores data indicating whether any change should be applied to such programs stored in those addresses. Other memories are provided for storing the memory bank data memorizing the addresses of the modified programs among such programs stored in the mask ROM and the modified programs and also storing the modified programs themselves. The electronic cash register embodied by the present invention permits the system to easily and securely write and store a variety of data necessary for changing programs stored in the mask ROM in those memories mentioned above via an input provided for inputting and processing a variety of trading data.