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. 28, 1985
Filed:
May. 10, 1983
NEC Corporation, Tokyo, JP;
Abstract
An electronic key telephone system comprising multiple key telephone stations 8-1 each connected to a central switch 2 by a single communication line 10-1 and to a central control unit 3, 4, 5 by a single data line 9-1. Each station has a plurality of buttons 150 for specifying a service request and a display 120 of current service status and means for periodically transmitting service requests over the data path. The central control unit periodically receives on the data line service requests from each of the buttons and transmits service status information to the station.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile