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:
Nov. 10, 1998
Filed:
Jan. 29, 1996
Applicant:
Inventors:
Assignee:
Hitachi Denshi Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
455-51 ; 348 12 ; 455519 ;
Abstract
A method and system for supervising communications a multi-channel access communication system having a plurality of terminals connected to a plurality of communication channels. The terminals are classified into a plurality of groups each including at least one terminal. When a group calls another group, it is checked by referring to a management table if there is any terminal in communications in the called group. If there is a terminal in communications, the call is invalidated.