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. 31, 1994
Filed:
Aug. 17, 1990
Masashi Hiraiwa, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An exchanging system in which data is transferred between a plurality of exchange offices connected to a switch network such that data is transferred between files associated with the respective exchange offices. The exchanging system includes a user process for outputting an input/output request to a file of a particular exchange office of a user, an input/output control unit operative in response to the input/output request from the user process for outputting an access request to an exchanging system of another particular communicating exchange office to which the file belongs, and a signal connection unit operative based on the access request for outputting signal connection control information to the particular exchange office to establish a connection to the exchange office to which the particular file belongs.