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. 13, 1998
Filed:
Nov. 12, 1996
Applicant:
Inventor:
Taichi Kosugi, Shizuoka-ken, JP;
Assignee:
Kabushiki Kaisha Kawai Gakki Seisakusho, Shizuoka-Ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G10H / ; H03K / ; H03M / ;
U.S. Cl.
CPC ...
84617 ; 84621 ; 341 24 ; 341 26 ;
Abstract
In an electronic musical instrument which generates musical tone signals based on playing information input from a key switch circuit 10, a key scan circuit 11 includes a decode circuit 22 to which the current status information and the previous status information read out from a scan data memory 21 are input, and if status information which cannot be processed is input, the decode circuit 22 converts it to status information which can be processed, and if there is no empty space in an output data buffer 24, the decode circuit 22 detects no status change. Such construction allows malfunction to be prevented with a simple construction.