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:
Jul. 29, 1986
Filed:
Oct. 09, 1984
Applicant:
Inventors:
Hirotoshi Shirasu, Yokohama, JP;
Kazuo Yamakido, Nishitama, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04Q / ;
U.S. Cl.
CPC ...
370 62 ;
Abstract
In order to realize a system in which three or more subscriber parties can hold a conference, and a PCM decoder is also provided with a circuit which adds part of a received digital PCM signal on the input side of the PCM decoder to a PCM signal corresponding to the output of the PCM coder.