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:
Jan. 12, 1988
Filed:
May. 23, 1985
Yasuo Itoh, Tokyo, JP;
Yuisuke Maruyama, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A digital conference circuit for multiplexed voice signals. Each slot for each of the users is further sub-divided into sub-slots for all the users. A selection circuit indicates which originating users are to be connected with which receiving users within a conference. No message is retransmitted to the originator. The received message in a slot is gated according to the selection signal into an adder, also receiving the output of a shift register holding the signals for all sub-slots in one slot. The added signal is shifted into the shift register. Once all the corresponding sub-slots have been added, the output of the shift register is transmitted to the users.