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. 19, 1988
Filed:
Jan. 27, 1987
Hatsuho Murata, Tokyo, JP;
Hideyuki Hirata, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A time switch with a dual structure-type control memory utilizing a time division time switch. The switch is equipped with a speech memory unit into which digital signals to be interchanged are temporarily written, and a control memory unit into which addresses to be accessed by the speech memory unit are written. The control memory unit has first and second memories. Each memory has an input/output section connected to a memory controller. The memories are set during hard and soft cycles so that when either one of the memories is set in a hard cycle the other memory is set in a soft cycle. The hard cycle is a speech-control data read-only mode. The soft cycle is a speech-control data read-write mode under control from the memory controller.