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:
Oct. 04, 1994
Filed:
Apr. 28, 1992
Mihoji Tsumura, Osaka, JP;
Shinnosuke Taniguchi, Osaka, JP;
Ricos Co., Ltd., Osaka, JP;
Abstract
A system for the transmission and reception of data by telephone line, the system making use of the idle time on the telephone line, which connects the switching system of a telephone exchange with the telephone in a user's home, to transmit signals by way of the telephone line from a center independent of the telephone exchange to the user's home. The center includes a data base for storing a plurality of items of compound data, each item consisting of a specified number of interrelated data groups, and a transmission unit which accesses the database, reads data groups in order from an item of compound data, converts the resultant digital signals to analog form and outputs the analog signals to the telephone line. The user's home includes a receiver, which converts analog signals received from the telephone line to digital form, and when the specified number of data groups have all been input, outputs each of the data groups simultaneously, and a specified number of terminals which operate in accordance with the data groups received from the receiver.